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Relevant bibliographies by topics / Transmitter-receivers

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Academic literature on the topic 'Transmitter-receivers'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 July 2024

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Journal articles on the topic "Transmitter-receivers"

1

Sharma, Naresh, and P. G. Poonacha. "Obtaining Synchronization for a Class of Chaotic Systems." International Journal of Bifurcation and Chaos 07, no. 11 (November 1997): 2587–92. http://dx.doi.org/10.1142/s0218127497001746.

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An iterative algorithm is proposed for constructing synchronizing receivers for a chosen class of chaotic transmitter systems. A complete knowledge of the transmitter system is not required. Identical synchronization is ensured with the transmitted signal in the constructed receivers. Potential applications of the method are discussed for communications.

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Safipour, Roxana, Sebastian Hölz, Marion Jegen, and Andrei Swidinsky. "On electric fields produced by inductive sources on the seafloor." GEOPHYSICS 82, no. 6 (November 1, 2017): E297—E313. http://dx.doi.org/10.1190/geo2016-0700.1.

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The transient electromagnetic (TEM) method has recently been proposed as a tool for mineral exploration on the seafloor. Similar to airborne TEM surveys conducted on land, marine TEM systems can use a concentric or coincident wire-loop transmitter and receiver towed behind a ship. Such towed-loop TEM surveys can be further augmented by placing additional stationary receivers on the seafloor throughout the survey area. We examine the electric fields measured by remote receivers from an inductive source transmitter within a 1D layered earth model. At sea, it is conceivable to deploy either a horizontal transmitter (such as the analogous standard airborne configuration) or a more exotic vertical transmitter. Therefore, we study and compare the sensitivity of the vertical and horizontal towed-loop systems with a variety of seafloor conductivity structures. Our results indicate that the horizontal loop system is more sensitive to the thickness of a buried conductive layer and would be advantageous over the vertical loop system in characterizing the size of a shallowly buried mineralized zone. The vertical loop system is more sensitive to a resistive layer than the horizontal loop system. The vertical electric field produced by the vertical loop transmitter is sensitive to greater depths than the horizontal fields, and measuring the vertical field at the receivers would therefore be advantageous. We also conducted a novel test of a towed horizontal loop system with remote dipole receivers in a marine setting. The system was tested at the Palinuro volcanic complex in the Tyrrhenian Sea, a site of known massive sulfide mineralization. Preliminary results are consistent with shallowly buried material in the seafloor of conductivities [Formula: see text].

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Lee, Won, Woochan Lee, and Dukju Ahn. "Maximum Efficiency Conditions Satisfying Power Regulation Constraints in Multiple-Receivers Wireless Power Transfer." Energies 15, no. 10 (May 23, 2022): 3840. http://dx.doi.org/10.3390/en15103840.

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We propose the conditions for maximum overall efficiency at the constraint of satisfying asymmetric load power requirements for each receiver, for multiple-receivers wireless power transfer. Previously, the limitation of multiple-receiver analysis was that only the efficiency was maximized, whereas the requirements of load power were neglected. In many cases, conventional efficiency maximization assigns insufficient power to receivers far from the transmitter, while supplying excessive power to receivers near the transmitter. To resolve this limitation, we maximize the efficiency at the constraints of specified load power for each receiver. The proposed closed-form equation provides an optimum TX coil current amplitude, and the optimum load resistances of each receiver, to achieve the maximum efficiency at the load power regulation.

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Kim, Jonghoek. "TDOA-Based Target Tracking Filter While Reducing NLOS Errors in Cluttered Environments." Sensors 23, no. 9 (May 8, 2023): 4566. http://dx.doi.org/10.3390/s23094566.

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We consider tracking a moving target in a wireless communication system that is based on the radio signal. Considering a bounded workspace with many unknown obstacles, we handle tracking a non-cooperative transmitter using multiple signal receivers. Here, a non-cooperative transmitter is a transmitter whose signal emission time is not known in advance. We consider a time difference of arrival (TDOA) location problem, which locates the transmitter by processing the signal measurement time at multiple receivers. In tracking a non-cooperative transmitter, non-line-of-sight (NLOS) errors occur if obstacles block the LOS line connecting the receiver and the moving transmitter. Our article addresses how to track a moving transmitter while decreasing the NLOS error in TDOA-only measurements. We propose an algorithm to localize a transmitter while decreasing the NLOS error in TDOA measurements. For tracking a moving transmitter in real time, we integrate the proposed localization algorithm and the interacting multiple model Kalman filter (IMM KF). As far as we know, our article is novel in tracking a moving transmitter based on TDOA-only measurements in an unknown mixed LOS/NLOS workspace. We show that the proposed filter considerably decreases the NLOS errors in TDOA-only measurements while running fast. Therefore, the proposed tracking scheme is suitable for tracking a moving transmitter in real time. Through MATLAB simulations, we show that the proposed filter outperforms other state-of-the-art TDOA filters, considering both time efficiency and tracking accuracy.

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J. Mohammed, Muthana, and Turki K. Hassan. "DESIGN AND SIMULATION OF A MULTI-RECEIVER WIRELESS POWER TRANSFER SYSTEM BASED ON TRANSMITTER CONTROL METHOD." Journal of Engineering and Sustainable Development 26, no. 6 (November 4, 2022): 39–51. http://dx.doi.org/10.31272/jeasd.26.6.5.

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As is usual in a multiple-receiver wireless power transfer (WPT) system based on s-s geometry, the power of load obtained and system efficiency are very sensitive to changes in the number of receivers. An improved multi-receivers WPT system is introduced that ensures the power given for each load remains stable while other receivers enter or exit the system. This study proposes a multiple-load WPT system operated by a class E amplifier. The equivalent system circuit model is analyzed of major parameters such as receiver power, transmitter power, transmission efficiency, and each load power allocation. A control circuit is proposed to obtain high transmission efficiency, power control for the transmitter, and arbitrary power distribution ratios of receivers for different loads. The cross-coupling between the receiver coils is prevented by adding compensating capacitors at the receiver side in series. This further increases the power stability obtained by loads. Finally, in order to verify the feasibility of the proposed process, simulation results are presented.

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Warda, Ahmad, Bojana Petković, and Hannes Töpfer. "Indoor localization: novel RSSI approach based on analytical solution and two receivers." Journal of Sensors and Sensor Systems 6, no. 2 (November 20, 2017): 375–80. http://dx.doi.org/10.5194/jsss-6-375-2017.

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Abstract. Indoor localization based on trilateration method uses at least three receivers for an accurate localization in 2-D. We performed indoor localization in 2-D using only two receivers, combining algebraic equations for signal strengths into one quadratic equation with transmitter position as unknown and using a specific receiver placement at the two adjacent corners of the room. This receiver arrangement assures unique coordinates of the transmitter position inside a room, rejecting automatically the other solution which appears outside the room volume. The accuracy of the method is numerically tested in a room with dimensions of 9.7 m × 4.7 m × 3 m and shows a mean reconstruction error of 3.4 cm.

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Xun, Jian-Hui, Yajie Mu, Kunyi Zhang, Haixia Liu, and Long Li. "The Efficiency Improvement of Multiple Receivers in Wireless Power Transmission by Integrating Metasurfaces." Materials 15, no. 19 (October 6, 2022): 6943. http://dx.doi.org/10.3390/ma15196943.

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In this paper, we propose the use of metasurfaces to enhance evanescent wave coupling to improve the wireless power transfer (WPT) efficiency of multiple receivers. A 4 × 4 negative permeability metasurface is designed and placed between the transmitter (Tx) and receiver (Rx) coils for the greatest improvement in transfer efficiency. Through the analysis of the number and position topologies of Rx coils, the efficiency can be greatly improved; the maximum efficiency at longer transmission distances is achieved through the 4 × 4 negative permeability metasurface in the multiple−receiver system. We show with simulation and measurement results that the power transfer efficiency of the system can be improved significantly by integrating metasurfaces. The maximum transfer efficiency is achieved in a multiple−receiver WPT system when the number and topology of Rx coils is case 0 of single transmitter−three receivers (STTR). The results show that the total efficiency of the multiple receivers WPT system can be as high as 97%.

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Lee, Joungha, and Seung Beop Lee. "Transmitter Module Optimization for Wireless Power Transfer Systems with Single Transmitter to Multiple Receivers." Mathematics 9, no. 22 (November 17, 2021): 2928. http://dx.doi.org/10.3390/math9222928.

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Most of the coil designs for wireless power transfer (WPT) systems have been developed based on the “single transmitter to a single receiver (S-S)” WPT systems by the empirical design approaches, partial domain searches, and shape optimization methods. Recently, the layout optimizations of the receiver coil for S-S WPT systems have been developed using gradient-based optimization, fixed-grid (FG) representation, and smooth boundary (SB) representation. In this paper, the new design optimization of the transmitter module for the “single transmitter to multiple receivers (S-M)” WPT system with the resonance optimization for the S-M WPT system is proposed to extremize the total power transfer efficiency while satisfying the load voltage (i.e., rated power) required by each receiver and the total mass used for the transmitter coil. The proposed method was applied to an application model (e.g., S-M WPT systems with two receiver modules). Using the sensitivity of design variables with respect to the objective function (i.e., total power transfer efficiency) and constraint functions (i.e., load voltage of each receiver module and transmitter coil mass) at each iteration of the optimization process, the proposed method determines the optimal transmitter module that can maximize the total power transfer efficiency while several constraints are satisfied. Finally, the optimized transmitter module for the S-M WPT system was demonstrated through comparison with experiments under the same conditions as the simulation environment.

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Kazem, Ali, Adnan Malki, and Anas Mahmoud Almanofi. "Target Coordinates Estimation by Passive Radar with a Single non-Cooperative Transmitter and a Single Receiver." Journal of communications software and systems 16, no. 2 (May 4, 2020): 156–62. http://dx.doi.org/10.24138/jcomss.v16i2.984.

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Passive radar is a bistatic radar that detects and tracks targets by processing reflections from non-cooperative transmitters. Due to the bistatic geometry for this radar, a target can be localized in Cartesian coordinates by using one of the following bistatic geometries: multiple non-cooperative transmitters and a single receiver, or a single non-cooperative transmitter and multiple receivers, whereas the diversity of receivers or non-cooperative transmitters leads to extra signal processing and a ghost target phenomenon. To mitigate these two disadvantages, we present a new method to estimate Cartesian coordinates of a target by a passive radar system with a single non-cooperative transmitter and a single receiver. This method depends on the ability of the radar receiver to analyze a signal-to-noise ratio (SNR) and estimate two arrival angles for the target’s echo signal. The proposed passive radar system is simulated with a Digital Video Broadcasting-Terrestrial (DVB-T) transmitter, and the simulation results show the efficiency of this system compared with results of other researches.

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Athira, Puteri, Tze-Zhang Ang, and Mohamed Salem. "Resonant Inductive Coupling for Wireless Power Transmission." International Journal of Energy and Power Systems 2, no. 1 (March 18, 2022): 1–5. http://dx.doi.org/10.54616/ijeps/20220301.

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Wireless power transmission (WPT) is the method that transferring electrical energy from power source to electrical without any physical contact and it can be used to transfer power to electricity dependent systems or devices. In WPT, electromagnetic energy is produced to transmit the energy from power source (transmitter) to the load (receiver) via resonant inductive coupling. This article focuses on the design of a resonant inductive coupling using parallel-T topology in coupling WTR and combined of single transmitter with multiple receivers. In addition, principle of magnetic wave between the transmitter and receiver with related parameters is utilized to develop in WPT. A parallel-T topology that consists of T-matching network for secondary side is proposed as it is more suitable for weak coupling wireless power transfer applications. Besides that, three circuits are designed to show the resonant inductive coupling for WTP which including the circuit with and without matching network and the circuit of single transmitter with multiple receivers. The simulation of output voltage and output current are observed to relate the effects of frequency on the circuit. The graph of output voltage and power are plotted to show the pattern on effect of the frequencies to the resonant inductive coupling circuit.

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Dissertations / Theses on the topic "Transmitter-receivers"

1

Elmaghraby, Ahmed [Verfasser]. "Transmitter Leakage Cancellation in Cellular Handset Receivers / Ahmed Elmaghraby." München : Verlag Dr. Hut, 2016. http://d-nb.info/1111160333/34.

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Kim, Hyung Joon. "Multi-standard radio transceiver architectures and radio frequency front-end design." Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1110399471.

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Thesis (Ph. D.)--Ohio State University, 2005.
Title from first page of PDF file. Document formatted into pages; contains xv, 128 p.; also includes graphics (some col.). Includes bibliographical references (p. 125-128). Available online via OhioLINK's ETD Center

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Park, Youngcheol. "Dual-Band Transmitters Using Digitally Predistorted Frequency Multipliers for Reconfigurable Radios." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5107.

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The objective of the proposed research is to develop simplified reconfigurable transmission systems with frequency multipliers for the transmission of complex modulated signals. Because they rely on nonlinear properties, frequency multiplier-based transmission systems require proper linearization techniques and accurate modeling of the signal transfer function. To accomplish these two goals, the author has developed techniques to model and linearize frequency multipliers and to digitize feedback signals for nonlinear characterization. First, adaptive predistortion techniques and zonal transfer theories have been developed for modeling and linearization. The predistortion system has been verified by applying an IS-95B signal to various frequency multipliers built by the author. Second, because the output signals at higher harmonic zones occupy wider frequency bandwidths than the signal in the fundamental zone does and thus make it harder to use traditional sampling techniques, a simplified but effective method called the sub-Nyquist sampling rate was developed and verified. Third, two methods for reconfigurable transmitters using frequency multipliers in conjunction with digital predistortion linearizers were developed. Both methods make it possible to transmit complex signals via frequency multipliers by using dual-band transmission systems that incorporate frequency multipliers that are based on linearization techniques. One of these methods uses a circuit topology that can be switched between a fundamental-mode in-phase combined amplifier and a push-push frequency doubler using input phasing. The second suggested method uses a fundamental-frequency power amplifier followed by a varactor multiplier that can be bypassed with an RF switch. This work will contribute to the development of low-cost and size-effective reconfigurable transmission systems because it requires fewer transmitting components and needs less sampling of the feedback networks.

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He, Xin, and 何鑫. "Probabilistic quality-of-service constrained robust transceiver designin multiple antenna systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B48199527.

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In downlink multi-user multiple-input multiple-output (MU-MIMO) systems, different users, even multiple data streams serving one user, might require different quality-of-services (QoS). The transceiver should allocate resources to different users aiming at satisfying their QoS requirements. In order to design the optimal transceiver, channel state information is necessary. In practice, channel state information has to to be estimated, and estimation error is unavoidable. Therefore, robust transceiver design, which takes the channel estimation uncertainty into consideration, is important. For the previous robust transceiver designs, bounded estimation errors or Gaussian estimation errors were assumed. However, if there exists unknown distributed interference, the distribution of the channel estimation error cannot be modeled accurately a priori. Therefore, in this thesis, we investigate the robust transceiver design problem in downlink MU-MIMO system under probabilistic QoS constraints with arbitrary distributed channel estimation error. To tackle the probabilistic QoS constraints under arbitrary distributed channel estimation error, the transceiver design problem is expressed in terms of worst-case probabilistic constraints. Two methods are then proposed to solve the worst-case problem. Firstly, the Chebyshev inequality based method is proposed. After the worst-case probabilistic constraint is approximated by the Chebyshev inequality, an iteration between two convex subproblems is proposed to solve the approximated problem. The convergence of the iterative method is proved, the implementation issues and the computational complexity are discussed. Secondly, in order to solve the worst-case probabilistic constraint more accurately, a novel duality method is proposed. After a series of reformulations based on duality and S-Lemma, the worst-case statistically constrained problem is transformed into a deterministic finite constrained problem, with strong duality guaranteed. The resulting problem is then solved by a convergence-guaranteed iteration between two subproblems. Although one of the subproblems is still nonconvex, it can be solved by a tight semidefinite relaxation (SDR). Simulation results show that, compared to the non-robust method, the QoS requirement is satisfied by both proposed algorithms. Furthermore, among the two proposed methods, the duality method shows a superior performance in transmit power, while the Chebyshev method demonstrates a lower computational complexity.
published_or_final_version
Electrical and Electronic Engineering
Master
Master of Philosophy

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Pan, Bo. "Development of micromachined millimeter-wave modules for next-generation wireless transceiver front-ends." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24654.

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Thesis (Ph.D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008.
Committee Chair: John Papapolymerou; Committee Chair: Manos Tentzeris; Committee Member: Gordon Stuber; Committee Member: John Cressler; Committee Member: John Z. Zhang; Committee Member: Joy Laskar

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Zhao, Shaohua, and 趙少華. "The design of transmitter/receiver and high speed analog to digital converters in wireless communication systems: a convex programming approach." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41290525.

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Gibson, Jr Allen. "Design and simulation of CMOS active mixers." Master's thesis, University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4765.

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This paper introduces a component of the Radio Frequency transceiver called the mixer. The mixer is a critical component in the RF systems, because of its ability for frequency conversion. This passage focuses on the design analysis and simulation of multiple topologies for the active down-conversion mixer. This mixer is characterized by its important design properties which consist of conversion gain, linearity, noise figure, and port isolation. The topologies that are given in this passage range from the most commonly known mixer design, to implemented design techniques that are used to increase the mixers important design properties as the demand of CMOS technology and the overall RF system rises. All mixer topologies were designed and simulated using TSMC 0.18 micrometer] CMOS technology in Advanced Design Systems, a simulator used specifically for RF designs.
ID: 030646192; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (M.S.E.E.)--University of Central Florida, 2011.; Includes bibliographical references.
M.S.E.E.
Masters
Electrical Engineering and Computing
Engineering and Computer Science
Electrical Engineering

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Khlif, Wassim. "Design of Tunable Low-Noise Amplifier in 0.13um CMOS Technology for Multistandard RF Transceivers." Digital WPI, 2007. https://digitalcommons.wpi.edu/etd-theses/714.

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The global market of mobile and wireless communications is witnessing explosive growth in size as well as radical changes. Third generation (3G) wireless systems have recently been deployed and some are still in the process. 3G wireless systems promise integration of voice and data communications with higher data rates and a superior quality of service compared to second generation systems. Unfortunately, more and more communication standards continue to be developed which ultimately requires specific RF/MW and baseband communication integrated circuits that are designed for functionality and compatibility with a specific type of network. Although communication devices such as cellular phones integrate different services such as voice, Bluetooth, GPS, and WLAN, each service requires its own dedicated radio transceiver which results in high power consumption and larger PCB area usage. With the rapid advances in silicon CMOS integrated circuit technology combined with extensive research, a global solutionswhich aims at introducing a global communication system that encompasses all communication standards appears to be emerging. State of the art CMOS technology not only has the capability of operation in the GHz range, but it also provides the advantage of low cost and high level of integration. These features propel CMOS technology as the ideal candidate for current trends, which currently aim to integrate more RF/MW circuits on the same chip. Armed with such technology ideas such as software radio look more attainable than they ever were in the past. Unfortunately, realizing true software radio for mobile applications still remains a tremendous challenge since it requires a high sampling rate and a wide-bandwidth Analog-to-Digital converter which is extremely power hungry and not suitable for battery operated mobile devices. Another approach to realize a flexible and reconfigurable RF/MW transceiver that could operate in a diverse mobile environment and provides a multiband and multistandard solution. The work presented in this thesis focuses on the design of an integrated and tunable low-noise amplifier as part of software defined radio (SDR).

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Daempfling, Hauke C. "Design and implementation of the precision personnel locator digital transmitter system." Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-122006-161049/.

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Thesis (M.S.)--Worcester Polytechnic Institute.
Keywords: precision personnel locator; digital systems; embedded systems; waveform generation; data communication. Includes bibliographical references (leaves 108-110).

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Finn, Steven Ernest. "Interface circuit designs for extreme environments using SiGe BiCMOS technology." Thesis, Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22679.

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SiGe BiCMOS technology has many advantageous properties that, when leveraged, enable circuit design for extreme environments. This work will focus on designs targeted for space system avioinics platforms under the NASA ETDP program. The program specifications include operation under temperatures ranging from -180 C to +125 C and with radiation tolerance up to total ionizing dose of 100 krad with built-in single-event latch-up tolerance. To the author's knowledge, this work presents the first design and measurement of a wide temperature range enabled, radiation tolerant as built, RS-485 wireline transceiver in SiGe BiCMOS technology. This work also includes design and testing of a charge amplification channel front-end intended to act as the interface between a piezoelectric sensor and an ADC. An additional feature is the design and testing of a 50 Ohm output buffer utilized for testing of components in a lab setting.

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Books on the topic "Transmitter-receivers"

1

Laug, O. B. Electrical performance tests for audio distortion analyzers. Gaithersburg, Md: U.S. Dept. of Commerce, National Bureau of Standards, 1986.

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Bob, Schetgen, Healy James W, Roznoy Rich, and American Radio Relay League, eds. The ARRL radio buyer's sourcebook. Newington, CT: American Radio Relay League, 1991.

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IEEE Power Engineering Society. Power Systems Relaying Committee., Institute of Electrical and Electronics Engineers., and IEEE Standards Board, eds. IEEE standard for withstand capability of relay systems to radiated electromagnetic interference from transceivers. New York, N.Y., USA: Institute of Electrical and Electronics Engineers, 1995.

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Pfaff, Dirk. Frequency synthesis for wireless transceivers. Konstanz: Hartung-Gorre, 2003.

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Wepman, J. A. Impulse response measurements in the 1850-1990 MHz band in large outdoor cells. [Boulder, CO]: U.S. Dept. of Commerce, National Telecommunications and Information Administration, 1994.

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Peter, Papazian, and United States. National Telecommunications and Information Administration., eds. Flexible interoperable transceiver (FIT) program test range II: Radio propagation measurements at 440, 1360, and 1920 MHz Ft. Hood, Texas. [Washington, D.C.]: U.S. Dept. of Commerce, National Telecommunications and Information Administration, 2000.

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J, Achatz Robert, Luo Ye, and United States. National Telecommunications and Information Administration, eds. Nonlinear operation of a MMIC RF power amplifier and its effects on battery current, interference, and link margin. [Boulder, Colo.]: U.S. Dept. of Commerce, National Telecommunications and Information Administration, 2000.

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Henderson, Randolph L. Build your own intelligent amateur radio transceiver. New York: McGraw-Hill, 1997.

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National Institute of Justice (U.S.). Mobile digital equipment. Washington, D.C: The Institute, 1987.

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United States. National Aeronautics and Space Administration., ed. A high resolution radar altimeter to measure the topography of ice sheets: A thesis. [Washington, DC: National Aeronautics and Space Administration, 1997.

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Book chapters on the topic "Transmitter-receivers"

1

Wang, Yuekun, Zhonghao Wei, Feng Tian, and Long Zhuang. "Geolocation Accuracy of Bistatic InSAR Configuration with Geostationary Transmitter and LEO Receivers." In Proceedings of the 7th China High Resolution Earth Observation Conference (CHREOC 2020), 295–301. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-5735-1_22.

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Zheng, Shanpu, Ying Luo, Xuwen Wang, and Chenguang Xu. "Laser Ultrasonic Lamb Wave Damage Detection Method Based on the Single Transmitter and Multiple Receivers Circular Array." In Lecture Notes in Mechanical Engineering, 171–84. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-44282-7_14.

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Datta, Debasish. "WDM Local-Area Networks." In Optical Networks, 235–98. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198834229.003.0006.

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WDM-based broadcast-and-select transmission over optical passive-star topology can significantly enhance the speed of optical LANs/MANs. This type of optical LAN/MAN (or simply WDM LAN) can function using a variety of network architectures. In particular, WDM LANs can transmit packets between two nodes using direct or single-hop transmission or through intermediate nodes using multihop transmission, leading to broadly two types of network architectures: single-hop and multihop. The nodes in WDM LANs can employ two types of transmitters and receivers: tunable transmitter (TT) or fixed transmitter (FT) and tunable receiver (TR) or fixed receiver (FR), giving four types of WDM transceiver configurations: TT-TR, TT-FR, FT-TR, and FT-FR. Of the four configurations, the first three can realize single-hop communication, while the fourth generally leads to multihop networks. In this chapter, we describe various types of passive-star-based WDM LANs and examine their salient performance features. (141 words)

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Ahmadi-Shokouh, Javad. "Optimal RF Beamforming for MIMO." In Advances in Wireless Technologies and Telecommunication, 165–72. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-4221-8.ch009.

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Secondary receivers in Multiple-Input Multiple-Output (MIMO) Cognitive Radio (CR) networks combat interference from primary transmitters while equipped with whitening filters. However, when the MIMO secondary users are employing Radio Frequency (RF) beam-forming networks at the transmitter/receiver front ends to improve the MIMO transmission performance, the whitening filters cannot perform interference cancellation. In this chapter, transmit/receive optimum RF beamforming is proposed for a MIMO spatial multiplexing system. The performance of the optimally designed RF beamforming technique is evaluated over a Rician channel via computer simulations. Simulation results are assessed for different RF beamforming structures and the number of primary transmitters causing interference on the secondary receiver.

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Nguyen, Ngoc Hung, and Kutluyıl Doğançay. "Optimal geometries for multistatic target localization with one transmitter and multiple receivers." In Signal Processing for Multistatic Radar Systems, 77–97. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-815314-7.00015-9.

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Kumar, Mr K. Shravan. "ACOUSTIC SYSTEM FOR UNDER WATER COMMUNICATION." In Futuristic Trends in Network & Communication Technologies Volume 3 Book 4, 8–25. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bfnc4p1ch2.

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The expanding use of underwater acoustic communications (UWAC) in industrial and military contexts underscores the need for robust communication security. Underwater acoustic networks (UWANs), which often operate autonomously over extended periods, pose a unique challenge due to the lack of encryption in UWAC packets caused by physical limitations. This exposes UWANs to threats like fraudulent messages. To address this, a novel algorithm for message authentication in UWANs is introduced. The algorithm capitalizes on the distinct spatial dependence of underwater acoustic channels, where attackers can imitate the channel associated with a legitimate transmitter for a limited set of receivers. Trusted nodes in the network collaborate with a central sink node to enhance authentication. The sink node combines evaluations from trusted nodes upon receiving each packet, based on estimated statistical channel attributes sensitive to transmitter-receiver placement shifts. The algorithm's effectiveness is supported by comprehensive simulation results, showcasing its accuracy in detecting malicious packets from potential attackers. Additionally, empirical evidence from a sea experiment validates the practicality and efficacy of the proposed approach in confirming message authenticity within underwater acoustic networks

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Shah, Hardip K., Tejal N. Parmar, Nikhil Kothari, and K. S. Dasgupta. "Performance Evaluation of Full Diversity QOSTBC MIMO Systems with Multiple Receive Antenna." In Applications and Developments in Grid, Cloud, and High Performance Computing, 274–84. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-2065-0.ch018.

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Multipath fading is inherent in wireless communication systems. Diversity is the technique which takes advantage of multipath to mitigate the effect of fading and increase signal strength. Space Time Block codes (STBC) are used in MIMO systems to improve the performance by maximizing transmit and/or receive diversity. Among different schemes based on STBC, Quasi Orthogonal Space Time Block Code (QOSTBC) is able to achieve full rate transmission for more than two transmit antennas. Constellation Rotation QOSTBC (CR-QOSTBC) achieves full diversity and improves performance further along with full rate, to overcome the limitation of QOSTBC, which is unable to maintain orthogonality amongst the codes transmitted by different antennas. Higher diversity can be achieved by increasing uncorrelated paths between transmitter and receivers using higher number of receive antennas. This paper examines improvement in BER with reference to a number of receive antennas. Simulations were carried out under ideal as well as realistic environments, using least square technique with four antennas at transmitter side and variable receive antennas. Results of simulations presented in this paper indicate performance improvement of CR-QOSTBC over QOSTBC in flat fading channel environment. Simulation results also show performance degradation in BER when channel is estimated at the receiver.

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Iqbal, Saad, Usman Iqbal, and Syed Ali Hassan. "Intelligent Tracking and Positioning of Targets Using Passive Sensing Systems." In Advances in Wireless Technologies and Telecommunication, 286–305. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7458-3.ch012.

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Target localization and tracking has always been a hot topic in all eras of communication studies. Conventional system used radars for the purpose of locating and/or tracking an object using the classical methods of signal processing. Radars are generally classified as active and passive, where the former uses both transmitter and receivers simultaneously to perform the localization task. On the other hand, passive radars use existing illuminators of opportunity such as wi-fi or GSM signals to perform the aforementioned tasks. Although they perform detection using classical correlation methods and CFAR, recently machine learning has been used in various application of passive sensing to elevate the system performance. The latest developed models for intelligent RF passive sensing system for both outdoor and indoor scenarios are discussed in this chapter, which will give insight to the readers about their designing.

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Utschick, Wolfgang, Pedro Tejera, Christian Guthy, and Gerhard Bauch. "Transmission in MIMO OFDM Point to Multipoint Networks." In Handbook on Advancements in Smart Antenna Technologies for Wireless Networks, 328–51. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-988-5.ch016.

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This chapter discusses four different optimization problems of practical importance for transmission in point to multipoint networks with a multiple input transmitter and multiple output receivers. Existing solutions to each of the problems are adapted to a multi-carrier transmission scheme by considering the special structure of the resulting space-frequency channels. Furthermore, for each of the problems, suboptimum approaches are presented that almost achieve optimum performance and, at the same time, do not have the iterative character of optimum algorithms, i.e., they deliver a solution in a fixed number of steps. The purpose of this chapter is to give an overview on optimum design of point to multipoint networks from an information theoretic perspective and to introduce non-iterative algorithms that are a good practical alternative to the sometimes costly iterative algorithms that achieve optimality.

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"Challenges for Diadromous Fishes in a Dynamic Global Environment." In Challenges for Diadromous Fishes in a Dynamic Global Environment, edited by Michael J. W. Stokesbury, Michael J. Dadswell, Kim N. Holland, George D. Jackson, W. Don Bowen, and Ronald K. O’Dor. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874080.ch20.

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<em>Abstract</em>.-Tagging fish with electronic tags can provide information on movement, migration, behavior, and stock structure while diadromous species are at sea. The state of the art technology for tracking fishes in the marine environment includes two families of tags. Archival tags store data and either relay them to satellites or require recapture for interrogation. Low return rates for diadromous species make these tags very expensive to use. A second type, acoustic tags, sends signals to passive receivers. Information is collected from the fish only when it is within range of a receiver. Technology is now being developed to mesh these tags into a fully integrated tag that will permit archived data to be transmitted acoustically over multiple frequencies to receivers allowing data retrieval without recapturing the animal. The new technology includes a "business card" tag that is a miniaturized receiver coupled with a coded pulse transmitter. These tags will exchange and record individual-specific codes when two animals carrying them come within acoustic range of each other, which will allow data from many animals to be moved ashore through few animals. These devices would be ideal for quantifying the degree of school fidelity (or, conversely, mixing) or the degree of at sea interaction of fishes from different river systems and provide ecological information to enhance management in an ecosystem approach to fisheries.

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Conference papers on the topic "Transmitter-receivers"

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Ray, Probir Kumar, Nishant Unnikrishnan, and Ajay Mahajan. "Optimal Configuration of Ultrasonic Sensors in a 3D Position Estimation System Using Genetic Algorithms." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/dsc-24503.

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Abstract This paper provides a genetic algorithm based approach to calculate the optimal placement of receivers in a 3D position estimation system that uses the difference in the time-of-arrivals (TOA) of an ultrasonic wave from a transmitter to the different receivers fixed in 3D space. This is a different approach to traditional systems that use the actual time-of-flights (TOF) from the transmitter to the different receivers and triangulate the position of the transmitter. The new approach makes the system more accurate, makes the transmitter independent of the receivers and does not require the need of calculating the time delay term that is inherent in traditional systems due to delays caused by the electronic circuitry. This paper presents a thorough analysis of receiver configurations in the 2D and 3D system that lead to singularities, i.e. locations of receivers that lead to formulations that can not be solved due to a shortage of information. It provides guidelines of where not to place receivers, and further, presents a detailed analysis of locations that are optimal, i.e. locations that lead to the most accurate estimation of the transmitter positions. The results presented in this paper are not only applicable to ultrasonic systems, but all systems that use wave theory, e.g. infrared, laser, etc. This work finds applications in virtual reality cells, robotics, guidance of indoor autonomous vehicles and vibration analysis.

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Livescu, G., L. M. F. Chirovsky, T. Mullally, and Arza Ron. "Gigabit per second switching of smart pixel receiver-transmitter pairs." In Photonics in Switching. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/ps.1995.pfb6.

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Smart pixels are opto-electronic circuits with optical input/output and electronic logic circuits for complex functionality [1]. Arrays of smart pixels can control two dimensional arrays of light beams in high speed, high throughput free space photonic switching systems [2]. An example are the 4x4 arrays of 2x1 embedded control routing nodes, based on GaAs/AlGaAs field-effect-transistor self-electrooptic-effect device (FET-SEED) technology [3], recently used in a five stage switching system [4]. Although this system was operated at 155Mbit/s only, the speeds of smart pixels can be made much higher. One way to achieve increased speeds is by addition of gain stages and the use of larger FETs. However, this makes the receivers and transmitters larger and more dissipative. Another way to increase the switching speed is to use short pulses as optical inputs, which, according to theory [5], considerably reduces the switching time of the receivers. Simple receivers have, indeed, been demonstrated to operate up to 1Gbit/s [6], but receiver-transmitter pairs could only operate up to 650Mbit/s [7]. The speed of the pair was limited by the performance of the transmitter used, which consisted of a FET inverter driving the common node of two modulators connected in series. One can make a faster transmitter by eliminating the load FET and one of the modulators, thus reducing the capacitance and increasing the effective charging current of the modulator. With such a transmitter, and the use of mode-locked pulses in the AROEBICS (Asynchronous Reset On Every Bit for Input Contentionless Switching) method [8], 200ps switching times were recently obtained [9,10]. This result indicated that smart pixels containing this transmitter should be capable of operating in the GHz range. In the present work we use trains of mode-locked laser pulses separated by 1ns to demonstrate the 1GHz operation of a receiver-transmitter pair.

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Jargon, Jeffrey A., Xiaoxia Wu, Paul D. Hale, Klaus M. Engenhardt, and Alan E. Willner. "Transmitter for Calibrating Extinction Ratio Measurements of Optical Receivers." In National Fiber Optic Engineers Conference. Washington, D.C.: OSA, 2009. http://dx.doi.org/10.1364/nfoec.2009.jwa24.

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Kudo, Ryotaro, Koutaro Hachiya, Toshiki Kanamoto, and Atsushi Kurokawa. "A Parabolic Spiral Coil Transmitter for Charging Multiple Receivers." In 2022 IEEE 11th Global Conference on Consumer Electronics (GCCE). IEEE, 2022. http://dx.doi.org/10.1109/gcce56475.2022.10014087.

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Danzer, U., and J. Schwider. "Two-dimensional optical star-network." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/cleo_europe.1996.cthi50.

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An interconnection network for a modular expandable multiprocessor system is shown. Such a computer system needs a direct coupling among all processor units. For synchronisation purposes or clock distribution the signal delay from one transmitter to all receivers should be the same. A fibre optical star network ensures a data distribution from all emitters to all receivers without delay, assuming equal fibre lengths.

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Yoshida, Yuki, Kazunori Hayashi, and Hideaki Sakai. "On the effect of transmitter IQ imbalance at OFDMA receivers." In ICASSP 2009 - 2009 IEEE International Conference on Acoustics, Speech and Signal Processing. IEEE, 2009. http://dx.doi.org/10.1109/icassp.2009.4960149.

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Nelson, Jill K., Jaime E. Almodovar, Maya R. Gupta, and William H. Mortensen. "Estimating multiple transmitter locations from power measurements at multiple receivers." In ICASSP 2009 - 2009 IEEE International Conference on Acoustics, Speech and Signal Processing. IEEE, 2009. http://dx.doi.org/10.1109/icassp.2009.4960195.

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Alresheedi, Mohammed T., Ahmed Taha Hussein, and Jaafar M. H. Elmirghani. "Hybrid diffuse IR transmitter supporting VLC systems with imaging receivers." In 2016 18th International Conference on Transparent Optical Networks (ICTON). IEEE, 2016. http://dx.doi.org/10.1109/icton.2016.7550290.

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Zhang, Jinsong, Zixian Wei, Stephen Misak, Aaron Wissing, Junqian Liu, Hector Andrade, Aaron Maharry, et al. "First Demonstration of 200-G Coherent PON at O-band with Heterogeneously-Integrated SiP Tx and Rx with Lasers." In Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2024. http://dx.doi.org/10.1364/ofc.2024.th4c.1.

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We demonstrate the first 200-G O-band coherent PON using a heterogeneously-integrated SiP PIC transmitter as an OLT and PIC/EIC receivers as ONUs. A joint DSCM and NOMA scheme is presented for flexibly dense access scenarios.

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Menon, Abhishek R., and Amritha Aravind. "Offline Train Tracking System." In 2nd International Conference on Modern Trends in Engineering Technology and Management. AIJR Publisher, 2023. http://dx.doi.org/10.21467/proceedings.160.19.

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Population growth is directly related to transportation connectivity. In India, transport facilities are primarily served by Indian Railways. The work “OFFLINE TRAIN TRACKING SYSTEM” works on transmitter receiver-based logic. Transmitters are installed at stations and receivers are installed inside trains. When the train comes within range of the transmitter, the receiver receives the signal and displays the station name on the LCD screen. Transmitters installed at stations operate on 230 V AC and receivers in trains operate on 9 V DC. Work is not manually controlled. If the transmitter is on and the receiver is receiving the signal. Then, the station name is automatically displayed on the display. The work is not manually controlled. When the transmitter is ON and the receiver receives signals from transmitter, then the display unit automatically displays the station name. NRF Transceiver is used in both railway station and train. Lora transceiver can also be used in place of NRF transceiver module, it has the range of 2.5 Km, and it can be more helpful in the case of early projection of forthcoming station. NRF transceiver has the range of 500 meters. It is not expensive and effective in nature. Lora transceiver is expensive and more effective than NRF module. Microcontroller is used in this project, and it is programmed with Embedded C. LCD Display and voice alert is installed with the microcontroller. As the transceiver in the station gives area information to the transceiver located in the train, the microcontroller projects the station name in the display and voice alert is also installed.

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