Bibliographies thématiques / Antenna processing

Littérature scientifique sur le sujet « Antenna processing »

Auteur : Grafiati
Publié le 25 mai 2024

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Articles de revues sur le sujet "Antenna processing"

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Vinothkanna, R. « A Survey – Wearable Antenna Techniques and its Applications ». December 2022 1, no 1 (15 décembre 2022) : 87–98. http://dx.doi.org/10.36548/rrrj.2022.1.008.

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Smart Antenna is an array of antennas which uses the smart signal processing algorithms to track and locate the client device using the direction of arrival of a signal. Smart Wearable Antennas are designed to function while being worn. Wearable antennas are used within the context of Wireless Body Area Networks. The wearable antenna is high in efficiency, miniature in size, and simple in structure, and is implemented with electrical performance and polarization effects, which helps in healthcare, medical and military applications, smart glasses, sensor devices in sports, etc. This research study reviews different wearable antenna technologies such as wearable textile antenna, microstrip antenna and wearable antenna array. Furthermore, the integrated different next generation antennas are also discussed.
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Vinothkanna, R. « A Survey – Wearable Antenna Techniques and its Applications ». December 2022 1, no 1 (15 décembre 2022) : 87–98. http://dx.doi.org/10.36548/rrrj.2023.1.008.

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Smart Antenna is an array of antennas which uses the smart signal processing algorithms to track and locate the client device using the direction of arrival of a signal. Smart Wearable Antennas are designed to function while being worn. Wearable antennas are used within the context of Wireless Body Area Networks. The wearable antenna is high in efficiency, miniature in size, and simple in structure, and is implemented with electrical performance and polarization effects, which helps in healthcare, medical and military applications, smart glasses, sensor devices in sports, etc. This research study reviews different wearable antenna technologies such as wearable textile antenna, microstrip antenna and wearable antenna array. Furthermore, the integrated different next generation antennas are also discussed.
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Dawidowicz, Karol, et Radosław Baryła. « GNSS Antenna Caused Near-Field Interference Effect in Precise Point Positioning Results ». Artificial Satellites 52, no 2 (1 juin 2017) : 27–40. http://dx.doi.org/10.1515/arsa-2017-0004.

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Abstract Results of long-term static GNSS observation processing adjustment prove that the often assumed “averaging multipath effect due to extended observation periods” does not actually apply. It is instead visible a bias that falsifies the coordinate estimation. The comparisons between the height difference measured with a geometrical precise leveling and the height difference provided by GNSS clearly verify the impact of the near-field multipath effect. The aim of this paper is analysis the near-field interference effect with respect to the coordinate domain. We demonstrate that the way of antennas mounting during observation campaign (distance from nearest antennas) can cause visible changes in pseudo-kinematic precise point positioning results. GNSS measured height differences comparison revealed that bias of up to 3 mm can be noticed in Up component when some object (additional GNSS antenna) was placed in radiating near-field region of measuring antenna. Additionally, for both processing scenario (GPS and GPS/GLONASS) the scattering of results clearly increased when additional antenna crosses radiating near-field region of measuring antenna. It is especially true for big choke ring antennas. In short session (15, 30 min.) the standard deviation was about twice bigger in comparison to scenario without additional antenna. When we used typical surveying antennas (short near-field region radius) the effect is almost invisible. In this case it can be observed the standard deviation increase of about 20%. On the other hand we found that surveying antennas are generally characterized by lower accuracy than choke ring antennas. The standard deviation obtained on point with this type of antenna was bigger in all processing scenarios (in comparison to standard deviation obtained on point with choke ring antenna).
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Chougule, Rutuja. « Smart Antenna Systems ». International Journal for Research in Applied Science and Engineering Technology 10, no 6 (30 juin 2022) : 1182–86. http://dx.doi.org/10.22214/ijraset.2022.43988.

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Abstract: Smart antennas have received increasing interest for improving the performance of wireless radio systems. These systems of antennas include a large number of techniques that attempt to enhance the received signal, suppress all interfering signals, and increase capacity, in general. The main purpose of this article is to provide an overview of the current state of research in the area of smart antennas, and to describe how they can be used in wireless systems. A smart antenna takes advantage of diversity effect at the source (transmitter), the destination (receiver), or both. Diversity effect involves the transmission and/or reception of multiple radio frequency (RF) waves to increase data speed and reduce the error rate. Thus, this article provides a basic model for determining the angle of arrival for incoming signals, the appropriate antenna beamforming, and the adaptive algorithms that are currently used for array processing. Moreover, it is shown how smart antennas, with spatial processing, can provide substantial additional improvement when used with TDMA and CDMA digitalcommunication systems.
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Miawarni, Herti, M. Mahaputra Hidayat, Surya Sumpeno et Eko Setijadi. « Tracking System for Indoor TV Antenna Based on CVBS Signal Processing ». Jurnal Elektronika dan Telekomunikasi 17, no 2 (31 décembre 2017) : 48. http://dx.doi.org/10.14203/jet.v17.48-55.

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Analog terrestrial TV is still a popular choice for urban societies although the migration to digital system has already begun. Video quality of analog TV was heavily influenced by performance of the antenna. Most users prefer to use indoor antenna due to its simplicity. The disadvantage of this type of antenna is the users may need to change the antenna direction repeatedly when they change to different TV channel. In this research, we designed and developed tracking system that enable indoor TV antenna to adjust its direction automatically to get optimum video clarity. This system is built by several servo motors and telescopic antennas. Composite Video Baseband Signal (CVBS) processing is used to obtain reference information regarding video clarity level conditions on TV screen. The results show that CVBS signal processing has performance in describing video clarity level. System performance has been verified from trial results on some UHF channels. Minimum tracking time is reach 23.4 second and the maximum reach 24.6 second.
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Kuz'kin, Venedikt M., Sergey A. Pereselkov, Yuri V. Matvienko, Vladimir I. Grachev, Sergey A. Tkachenko et Nadezhda P. Stadnaya. « Holographic processing of hydroacoustic information using linear antennas ». Radioelectronics. Nanosystems. Information Technologies. 15, no 2 (29 juin 2023) : 169–78. http://dx.doi.org/10.17725/rensit.2023.15.169.

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The formation of an interferogram and a hologram of a moving underwater noise source using linear antennas is considered. The relationship between the spectral density of the hologram and the aperture and the angular dependence of the received field is derived. Antenna gain has been estimated. The issue of the limiting signal-to-noise ratio at which the holographic processing remains operational is discussed. An analytical expression is obtained that establishes a relationship between the signal/noise ratios at the output and input of the antenna. Conditions are formulated under which the interferogram of the source is not distorted.
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Basu, Sukla. « A Novel Shaped Four Port MIMO Antenna for Wireless Communication ». Asian Journal of Electrical Sciences 12, no 1 (14 juin 2023) : 17–22. http://dx.doi.org/10.51983/ajes-2023.12.1.3667.

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This paper presents a compact novel shaped micro strip line fed four element Multiple Input Multiple Output (MIMO) antenna for wireless application at 2.4 GHz. Four vertically oriented identical rectangular patch antennas are used to form a hollow cylinder of rectangular cross section. The direction of radiation of each antenna is thus oriented at 900 with respect to its two adjacent antennas providing good isolation between adjacent antennas in this compact MIMO system. Each antenna element has the dimensions of 0.30λx0.38λx0.012λ. The whole MIMO antenna has the outer dimensions of 0.38λx0.38λx0.30λ. The uniqueness of the proposed MIMO antenna is that the inner space of the hollow cylindrical structure can be used for hosting the associated signal processing unit of the whole system. Performance parameters of the proposed MIMO antenna are investigated using Computer Simulation Technology (CST). Envelope Correlation Coefficient (ECC) less than 0.033 and almost 10dB Diversity Gain (DG) are obtained at 2.4 GHz for this simple and compact antenna system. Ratio of Mean Effective Gain (MEG) of any two antennas is less than 0.02dB. Performance parameters of the proposed MIMO antenna system are compared with similar types of antennas found in recent literature.
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Lu, Zukun, Feiqiang Chen, Yuchen Xie, Yifan Sun et Hongliang Cai. « High Precision Pseudo-Range Measurement in GNSS Anti-Jamming Antenna Array Processing ». Electronics 9, no 3 (29 février 2020) : 412. http://dx.doi.org/10.3390/electronics9030412.

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Radio frequency interference has become a rising problem to the signal of the Global Navigation Satellite System (GNSS). An effective way to achieve anti-jamming is by using an antenna array in GNSS signal processing. However, antenna array processing will cause a decline in the accuracy of pseudo-range measurements because of the channel mismatch and some other non-ideal factors. To solve this problem, space–time or space–frequency adaptive array processing is widely used for interference cancellation while constraining the delay of each antenna at the same time. In this paper, an anti-jamming algorithm with a time-delay constraint is proposed, where one antenna is chosen as the reference and data from other antennas is corrected based on the signal received from it. The deduction and simulation results show that the proposed algorithm can effectively improve the accuracy of pseudo-range measurements without degradation of anti-jamming performance.
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KOCZ, J., L. J. GREENHILL, B. R. BARSDELL, G. BERNARDI, A. JAMESON, M. A. CLARK, J. CRAIG et al. « A SCALABLE HYBRID FPGA/GPU FX CORRELATOR ». Journal of Astronomical Instrumentation 03, no 01 (mars 2014) : 1450002. http://dx.doi.org/10.1142/s2251171714500020.

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Radio astronomical imaging arrays comprising large numbers of antennas, O(102–103), have posed a signal processing challenge because of the required O (N2) cross correlation of signals from each antenna and requisite signal routing. This motivated the implementation of a Packetized Correlator architecture that applies Field Programmable Gate Arrays (FPGAs) to the O (N) "F-stage" transforming time domain to frequency domain data, and Graphics Processing Units (GPUs) to the O (N2) "X-stage" performing an outer product among spectra for each antenna. The design is readily scalable to at least O(103) antennas. Fringes, visibility amplitudes and sky image results obtained during field testing are presented.
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Tserne, Eduard, Anatoliy Popov, Oleksandr Pidlisnyi, Danyil Kovalchuk et Oleksandr Sereda. « Four-antenna amplitude direction finder : statistical synthesis and experimental research of signal processing algorithm ». Radioelectronic and Computer Systems, no 4 (6 décembre 2023) : 88–99. http://dx.doi.org/10.32620/reks.2023.4.08.

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The subject of this study is the algorithms for measuring the angular positions of radio emission sources. The goal of this study is to develop an improved algorithm for signal processing in amplitude direction finders that will provide several unambiguous measurement angles at high steepness of the discrimination characteristic by combining measurements of systems with different widths of antenna patterns. The task: to develop an optimal signal processing algorithm for a four-antenna amplitude direction finding system, two antennas of which have a wide radiation pattern and the other two have a narrow one; to test the overall performance of the resulting algorithm by simulating the direction finder; to develop and conduct a study of an experimental model of a four-antenna direction finder, which includes two antennas with wide radiation patterns, two antennas with narrow radiation patterns, radio frequency paths, and a signal processing unit that implements the developed algorithm; to analyze the effectiveness and features of the application of the developed algorithm, and to compare the results of simulation modeling and experimental research. The methods used are statistical methods and optimal solutions for solving problems of statistical synthesis of signal processing algorithms in passive radio systems, computer simulation modeling methods, and experimental research methods. The following results were obtained. The algorithm for signal processing in a four-antenna direction finding system was synthesized using the maximum likelihood method. By simulation modeling, the overall effectiveness of measurement integration in multi-antenna amplitude direction finders was confirmed, and the peculiarities of the synthesized algorithm application were revealed, namely, the need to introduce additional proportionality coefficients into the measurement channels. During the experimental studies of the developed model of the direction finder, the results of the simulation modeling were confirmed. Conclusions. To determine the direction of radiation sources by amplitude direction finders, it is advisable to simultaneously use systems with wide and narrow antenna patterns, the measurements of which are combined by the proposed algorithm. This makes it possible to simultaneously expand the range of unambiguous measurement angles and increase the accuracy of measurements within the equal-signal zone. The disadvantage of using the algorithm is the nonlinear form of the obtained discrimination characteristics and the need to determine additional proportionality coefficients heuristically.
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Thèses sur le sujet "Antenna processing"

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Sabbar, Bayan M. « High resolution array signal processing ». Thesis, Loughborough University, 1987. https://dspace.lboro.ac.uk/2134/27193.

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This study is concerned with the processing of signals received by an array of sensor elements which may range from acoustic transducers in a sonar system to microwave horns in a radar system. The main aim of the work is to devise techniques for resolving the signals arriving from closely spaced sources in order to determine the presence and direction of these sources.
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Wennerholm, Lucas, et Adam Alenius. « Antenna Characterization with Autonomous UAV and Software Defined Radio ». Thesis, Uppsala universitet, Signaler och System, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-355444.

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A measurement equipment with the purpose of measuring the radiation pattern of antennas in the frequency interval 30-300 MHz was constructed. To perform the necessary measurements the equipment needs to be mounted on a UAV, a necessity that demands a low weight from the measurement equipment. These kinds of measurements are today done with equipment that is mounted on helicopters, making the equipment smaller and fitting it on an UAV will save cost for the persons or companies that need to utilize this service. To ensure that the system is easy to use for anyone who wants to characterize an antenna efforts were made to make the software application user friendly. The system visualizes measurement results in 2D diagrams that are simple to analyze. Since the equipment has size restrictions the computer in the system needs to be small and light. The single board computer used has computational limitations and therefore the digital signal processing must be carefully designed to both be fast and generate good measurement data. To verify the performance of the system tests and theoretical simulations where performed and compared. The tests were performed both in an echo free antenna chamber and in realistic outdoor environments with an UAV. The finished system performed well and the measurement results showed clear similarities with the theoretical simulations. The outdoor environment clearly influences the shape of an antennas radiation pattern and the need to characterize antennas in a realistic environment became clear.
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Shapoury, Alireza. « Ultra wideband antenna array processing under spatial aliasing ». [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1495.

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Bengtsson, Mats. « Antenna array signal processing for high rank data models ». Doctoral thesis, KTH, Signaler, sensorer och system, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2903.

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Chakravorti, Mark F. J. « CMOS analog signal processing for a smart antenna system ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/MQ49671.pdf.

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Kaiser, Julius A. « RETRODIRECTIVE ANTENNA SYSTEM ». International Foundation for Telemetering, 1995. http://hdl.handle.net/10150/608421.

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International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada
Two retrodirective antenna systems that autonomously point high gain beams to a signal source without requiring a priori knowledge of location are described. The first is a stationary phased array requiring no phase shifters or switches for its operation. The second is a steerable platform with a thinned receive array for signal acquisition and platform pointing and dish(es) to satisfy the high gain function.
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Kogon, Stephen Michel. « Adaptive array processing tecniques for terrain scattered interference mitigation ». Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/14927.

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Alam, Fakhrul. « Space Time Processing for Third Generation CDMA Systems ». Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/29669.

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The capacity of a cellular system is limited by two different phenomena, namely multipath fading and multiple access interference (MAI). A Two Dimensional (2-D) receiver combats both of these by processing the signal both in the spatial and temporal domain. An ideal 2-D receiver would perform joint space-time processing, but at the price of high computational complexity. In this dissertation we investigate computationally simpler technique termed as a Beamformer-Rake. In a Beamformer-Rake, the output of a beamformer is fed into a succeeding temporal processor to take advantage of both the beamformer and Rake receiver. Wireless service providers throughout the world are working to introduce the third generation (3G) cellular service that will provide higher data rates and better spectral efficiency. Wideband CDMA (WCDMA) has been widely accepted as one of the air interfaces for 3G. A Beamformer-Rake receiver can be an effective solution to provide the receivers enhanced capabilities needed to achieve the required performance of a WCDMA system. This dissertation investigates different Beamformer-Rake receiver structures suitable for the WCDMA system and compares their performance under different operating conditions. This work develops Beamformer-Rake receivers for WCDMA uplink that employ Eigen-Beamforming techniques based on the Maximum Signal to Noise Ratio (MSNR) and Maximum Signal to Interference and Noise Ratio (MSINR) criteria. Both the structures employ Maximal Ratio Combining (MRC) to exploit temporal diversity. MSNR based Eigen-Beamforming leads to a Simple Eigenvalue problem (SE). This work investigates several algorithms that can be employed to solve the SE and compare the algorithms in terms of their computational complexity and their performance. MSINR based Eigen-Beamforming results in a Generalized Eigenvalue problem (GE). The dissertation describes several techniques to form the GE and algorithms to solve it. We propose a new low-complexity algorithm, termed as the Adaptive Matrix Inversion (AMI), to solve the GE. We compare the performance of the AMI to other existing algorithms. Comparison between different techniques to form the GE is also compared. The MSINR based beamforming is demonstrated to be superior to the MSNR based beamforming in the presence of strong interference. There are Pilot Symbol Assisted (PSA) beamforming techniques that exploit the Minimum Mean Squared Error (MMSE) criterion. We compare the MSINR based Beamformer-Rake with the same that utilizes Direct Matrix Inversion (DMI) to perform MMSE based beamforming in terms of Bit Error Rate (BER). In a wireless system where the number of co-channel interferers is larger than the number of elements of a practical antenna array, we can not perform explicit null-steering. As a result the advantage of beamforming is partially lost. In this scenario it is better to attain diversity gain at the cost of spatial aliasing. We demonstrate this with the aid of simulation. Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier technique that has recently received considerable attention for high speed wireless communication. OFDM has been accepted as the standard for Digital Audio Broadcast (DAB) and Digital Video Broadcast (DVB) in Europe. It has also been established as one of the modulation formats for the IEEE 802.11a wireless LAN standard. OFDM has emerged as one of the primary candidates for the Fourth Generation (4G) wireless communication systems and high speed ad hoc wireless networks. We propose a simple pilot symbol assisted frequency domain beamforming technique for OFDM receiver and demonstrate the concept of sub-band beamforming. Vector channel models measured with the MPRG Viper test-bed is also employed to investigate the performance of the beamforming scheme.
Ph. D.
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Wang, Xudong. « Microwave Photonic Signal Processing ». Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/10087.

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A new single-wavelength coherence-free microwave photonic notch filter is presented. The concept is based on a dual Sagnac loop structure that functions with a new principle in which the two loops operate with different free spectral ranges. Experimental results demonstrate a notch filter with a narrow notch width, a flat passband, and high stopband attenuation of over 40 dB. A new multiple-tap microwave photonic notch filter structure that can simultaneously realise a frequency-independent group delay together with a narrow notch filter response and large free spectral range is presented. The concept is based on using multiple wavelengths circulating in a Sagnac loop. Experimental results demonstrate a notch filter with a flat passband, a narrow notch width, a high rejection level of over 40 dB, and an extremely low group delay ripple of less than ±25 ps. A new photonic microwave phase shifting structure that can realise a continuous 0o to 360o phase shift with only little frequency dependent amplitude and phase variation over a wide frequency range is presented. It is based on controlling the wavelengths of two phase modulated optical signals into an optical filter with a nonlinear phase response. The new photonic microwave phase shifter has been experimentally verified showing the continuous 0o to 360o phase shifting operation with less than 3 dB amplitude variation over a wide frequency range. A new microwave photonic phase shifter structure is presented. It is based on the conversion of the optical carrier phase shift into an RF signal phase shift via controlling the carrier wavelength of a single-sideband RF modulated optical signal into a fibre Bragg grating. Experimental results demonstrate a continuous 0o to 360o phase shift with low amplitude variation of < 2 dB and low phase deviation of < 5o over a wideband microwave range.
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Hicks, James Edward. « Novel Approaches to Overloaded Array Processing ». Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/28670.

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An antenna array is overloaded when the number of cochannel signals in its operating environment exceeds the number of elements. Conventional space-time array processing for narrow-band signals fails in overloaded environments. Overloaded array processing (OLAP) is most difficult when signals impinging on the array are near equal power, have tight excess bandwidth, and are of identical signal type. Despite the failure of conventional beamforming in such environments, OLAP becomes possible when a receiver exploits additional signal properties such as the finite-alphabet property and signal excess-bandwidth. This thesis proposes three approaches to signal extraction in overloaded environments, each providing a different tradeoff in performance and complexity. The first receiver architecture extracts signals from an overloaded environment through the use of MMSE interference rejection filtering embedded in a successive interference cancellation (SIC) architecture. The second receiver architecture enhances signal extraction performance by embedding a stronger interference rejection receiver, the reduced-state maximum aposteriori probability (RS-MAP) algorithm in a similar SIC architecture. The third receiver fine-tunes the performance of spatially reduced search joint detection (SRSJD) with the application of an energy focusing transform (EFT), a complexity reducing front-end linear pre-processor. A new type of EFT, the Energy Focusing Unitary Relaxed Transform (EFURT) is developed. This transform facilitates a continuous tradeoff between noise-enhancement and error-propagation in an SRSJD framework. EFURT is used to study the role of this tradeoff for SRSJD receivers in a variety of signal environments. It is found that for the environments studied in this thesis, SRSJD enjoys an aggressive reduction in interference at the expense of possible noise-enhancement.
Ph. D.
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Livres sur le sujet "Antenna processing"

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F, Boldissar, Chang D. C. D et United States. National Aeronautics and Space Administration., dir. Antenna beamforming using optical processing. [Washington, DC : National Aeronautics and Space Administration, 1990.

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Titarenko, Larysa, et Alexander Barkalov. Methods of Signal Processing for Adaptive Antenna Arrays. Berlin, Heidelberg : Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-32132-0.

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Antenna-based signal processing techniques for radar systems. Boston : Artech House, 1992.

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Titarenko, Larysa. Methods of Signal Processing for Adaptive Antenna Arrays. Berlin, Heidelberg : Springer Berlin Heidelberg, 2013.

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Choi, Jinho. Optimal combining and detection : Statistical signal processing for communications. New York : Cambridge University Press, 2010.

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Martinez-Ramon, Manuel. Support vector machines for antenna array processing and electromagnetics. [San Rafael, Calif.] : Morgan & Claypool Publishers, 2006.

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Martínez-Ramón, Manel, et Christos Christodoulou. Support Vector Machines for Antenna Array Processing and Electromagnetics. Cham : Springer International Publishing, 2006. http://dx.doi.org/10.1007/978-3-031-01692-9.

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Naval Research Laboratory (U.S.), dir. Using spectral estimation techniques in adaptive processing antenna systems. Washington, D.C : Naval Research Laboratory, 1985.

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Institution of Engineering and Technology, dir. Developments in antenna analysis and design. Herts : The Institution of Engineering and Technology, 2019.

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Liu, K. J. Ray, 1961-, dir. Handbook on array processing and sensor networks. Hoboken, N.J : Wiley, 2009.

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Chapitres de livres sur le sujet "Antenna processing"

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Ahmed, Yasir. « Antenna Arrays ». Dans Recipes for Communication and Signal Processing, 99–131. Singapore : Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2917-7_6.

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Zhang, Yimin, Moeness G. Amin et Baha A. Obeidat. « Polarimetric Array Processing for Nonstationary Signals ». Dans Adaptive Antenna Arrays, 205–18. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-05592-2_12.

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Völcker, Björn, Mats Bengtsson et Björn Ottersten. « Spatially Spread Sources in Antenna Array Processing ». Dans Adaptive Antenna Arrays, 394–419. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-05592-2_23.

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Ramiro-Moreno, Juan, Lars T. Berger, Laurent Schumacher et Troels B. Sørensen. « Multiple Antenna Processing and Performance in WCDMA ». Dans Adaptive Antenna Arrays, 568–84. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-05592-2_32.

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Leong, Stetson Oh Kok, Ng Kim Chong, P. R. P. Hoole et E. Gunawan. « Smart Antennas : Mobile Station Antenna Location ». Dans Smart Antennas and Electromagnetic Signal Processing in Advanced Wireless Technology, 195–216. New York : River Publishers, 2022. http://dx.doi.org/10.1201/9781003339564-7.

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Hoole, P. R. P. « Elementary Antenna Theory ». Dans Smart Antennas and Electromagnetic Signal Processing in Advanced Wireless Technology, 45–83. New York : River Publishers, 2022. http://dx.doi.org/10.1201/9781003339564-2.

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Hoole, P. R. P. « Antenna Beamforming : Basics ». Dans Smart Antennas and Electromagnetic Signal Processing in Advanced Wireless Technology, 121–46. New York : River Publishers, 2022. http://dx.doi.org/10.1201/9781003339564-4.

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Wen, Yanbo, Huiwei Wang, Menggang Chen, Yawei Shi, Huaqing Li et Chuandong Li. « A Frequency Reconfigurable Multi-mode Printed Antenna ». Dans Neural Information Processing, 202–10. Singapore : Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-8073-4_16.

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Ottersten, Björn. « Antenna Arrays in Mobile Communications ». Dans Communications, Computation, Control, and Signal Processing, 547–54. Boston, MA : Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-6281-8_36.

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Foutz, Jeffrey, Andreas Spanias et Mahesh K. Banavar. « Background on Array Processing ». Dans Narrowband Direction of Arrival Estimation for Antenna Arrays, 5–15. Cham : Springer International Publishing, 2008. http://dx.doi.org/10.1007/978-3-031-01537-3_2.

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Actes de conférences sur le sujet "Antenna processing"

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Sulic, E., B. Pell, S. John, Rahul K. Gupta, W. Rowe, K. Ghorbani et K. Zhang. « Performance of Embedded Multi-Frequency Communication Devices in Smart Composite Structures ». Dans ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2008. http://dx.doi.org/10.1115/smasis2008-402.

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Lately, there has been an increased demand for vehicle manufacturers to incorporate a large number of communication, security, guidance and entertainment devices in their new vehicle models. In recent decades, the list has expanded from the AM and FM radio antennas to include GPS, mobile phone, collision avoidance radar, Digital Radio and Digital TV antennas. In addition, new technologies such as vehicle to vehicle and vehicle to road side communication are being implemented at 5.9 GHz in the next generation of vehicles. In the past the AM/FM antenna was typically a mast antenna protruding from the vehicle’s exterior, recently however, the trend has been to limit the visibility of vehicular antennas as much as possible to improve vehicle design and aerodynamics. This has lead to integration of antennae so that they become a seamless part of the vehicle structure. This paper reports on a parametric study of embedding an antenna in a polymeric composite substrate in relation to several material processing and coating parameters.
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Rajesh, Rajesh, Mohammad Monirujjaman Khan, Arifa Sultana, H. M. Arifur Rahman, Ipseeta Nanda et Ananyo Bhattacharya. « NOVEL AND COMPACT SIZE ULTRA WIDEBAND (UWB) WEARABLE BAND-NOTCH ANTENNA DESIGN FOR WIRELESS BODY SENSOR NETWORKS ». Dans TOPICS IN INTELLIGENT COMPUTING AND INDUSTRY DESIGN (ICID). Volkson Press, 2022. http://dx.doi.org/10.26480/icpesd.03.2022.246.251.

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Sensor downsizing, as well as advancements in wearable technology, embedded software, digital signal processing, and biomedical technologies, have caused the emergence of user-centric networks, in which devices may be carried in the user’s pockets and connected to the user’s body. Ultra-Wideband (UWB) technology has a lot of potential in wireless body sensor networks (WBSNs).Due to its small size, low transmission power, and high data rate UWB technology will be very good for WBSNs. Ultra-wideband antenna is one of the crucial components for WBSNs and it will be integrated with the wearable sensor system. The UWB antennas’ parameters change when attached to the human body, which needs to be investigated before developing the wearable system. Another unlisencedband according to FCC is Ultra Wideband frequency range which covers from 3.1 GHz to 10.6 GHz. However, there are other frequencies between 5 GHz to 6 GHz for some other applications within this range. As a result, a band notch in the UWB frequency range is necessary to avoid conflict with these frequencies.A good approach is to design an efficient UWB antenna using band-notch technology. The antenna design and performance investigation of an Ultra Wideband band-notch antenna for WBSNs is presented in this research. FR4 substrate material has been used in the proposed design. The Antenna’s free space and on-body behavior are both researched and assessed. To examine the on-body performance, the antenna is placed on a human torso phantom. This antenna’s free space and on-body simulation results were compared. The performance characteristics of the antenna are also tested by moving the antenna away from the human body at different distances. Key antenna characteristics such as return loss response, gain, impedance bandwidth, efficiency, and radiation pattern are extensively examined for better comparisons.Its small size, unique form, perfect band-notch feature, and excellent on-body behavior make it ideal for wireless body sensor networks in healthcare division applications.
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Anderson, L. P., F. Boldissar et D. C. D. Chang. « Antenna Beamforming Using Optical Processing ». Dans 1988 Los Angeles Symposium--O-E/LASE '88, sous la direction de Kul B. Bhasin et Brian M. Hendrickson. SPIE, 1988. http://dx.doi.org/10.1117/12.944200.

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Petrita, Teodor. « Approximation of antenna diagram for BTS antennas ». Dans 2011 34th International Conference on Telecommunications and Signal Processing (TSP). IEEE, 2011. http://dx.doi.org/10.1109/tsp.2011.6043731.

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Qian, Yunzhi, Ming Chen, Xinzheng Wang et Pengcheng Zhu. « Antenna location design for distributed antenna systems with selective transmission ». Dans Signal Processing (WCSP 2009). IEEE, 2009. http://dx.doi.org/10.1109/wcsp.2009.5371490.

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Romanov, Pavel. « Multibeam Antenna Reflector Distortions Reconstruction via Processing Antenna Array Signals ». Dans 2020 7th All-Russian Microwave Conference (RMC). IEEE, 2020. http://dx.doi.org/10.1109/rmc50626.2020.9312357.

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Romanov, Pavel. « Multibeam Antenna Reflector Distortions Reconstruction via Processing Antenna Array Signals ». Dans 2020 7th All-Russian Microwave Conference (RMC). IEEE, 2020. http://dx.doi.org/10.1109/rmc50626.2020.9312357.

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Dvorkind, Tsvi G., et Eran Greenberg. « Spatial processing with a single antenna ». Dans 2012 IEEE 27th Convention of Electrical & Electronics Engineers in Israel (IEEEI 2012). IEEE, 2012. http://dx.doi.org/10.1109/eeei.2012.6377119.

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Martinez-Ramon, M., A. Navia-Vazquez, C. G. Christodoulou et A. R. Figueiras-Vidal. « Adaptive antenna array processing with kernels ». Dans 2nd European Conference on Antennas and Propagation (EuCAP 2007). Institution of Engineering and Technology, 2007. http://dx.doi.org/10.1049/ic.2007.0908.

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Kasilingam, Dayalan, et Jigar Shah. « Antenna beamforming using multiplicative array processing ». Dans 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2017. http://dx.doi.org/10.1109/apusncursinrsm.2017.8072736.

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Rapports d'organisations sur le sujet "Antenna processing"

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Farr, Everett G., et Charles A. Frost. Ultra-Wideband Antennas and Propagation. Volume 2 : Antenna Measurements and Signal Processing. Fort Belvoir, VA : Defense Technical Information Center, juillet 1997. http://dx.doi.org/10.21236/ada328787.

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Doerry, Armin W., et Douglas L. Bickel. Single-Axis Three-Beam Amplitude Monopulse Antenna-Signal Processing Issues. Office of Scientific and Technical Information (OSTI), mai 2015. http://dx.doi.org/10.2172/1183360.

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Paulraj, Arogyaswami J. Multiple Antenna Communication With Time Reversal Mirror (MIMO-TRM) Pre-Processing. Fort Belvoir, VA : Defense Technical Information Center, septembre 2004. http://dx.doi.org/10.21236/ada426625.

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Himed, Braham. Effects of Antenna Mutual Coupling in Space-Time Adaptive Processing (STAP). Fort Belvoir, VA : Defense Technical Information Center, septembre 1998. http://dx.doi.org/10.21236/ada358691.

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Cook, Samantha, Marissa Torres, Nathan Lamie, Lee Perren, Scott Slone et Bonnie Jones. Automated ground-penetrating-radar post-processing software in R programming. Engineer Research and Development Center (U.S.), septembre 2022. http://dx.doi.org/10.21079/11681/45621.

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Ground-penetrating radar (GPR) is a nondestructive geophysical technique used to create images of the subsurface. A major limitation of GPR is that a subject matter expert (SME) needs to post-process and interpret the data, limiting the technique’s use. Post-processing is time-intensive and, for detailed processing, requires proprietary software. The goal of this study is to develop automated GPR post-processing software, compatible with Geophysical Survey Systems, Inc. (GSSI) data, in open-source R programming. This would eliminate the need for an SME to process GPR data, remove proprietary software dependencies, and render GPR more accessible. This study collected GPR profiles by using a GSSI SIR4000 control unit, a 100 MHz antenna, and a Trimble GPS. A standardized method for post-processing data was then established, which includes static data removal, time-zero correction, distance normalization, data filtering, and stacking. These steps were scripted and automated in R programming, excluding data filtering, which was used from an existing package, RGPR. The study compared profiles processed using GSSI software to profiles processed using the R script developed here to ensure comparable functionality and output. While an SME is currently still necessary for interpretations, this script eliminates the need for one to post-process GSSI GPR data.
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Ling, Hao. Application of Model-Based Signal Processing and Genetic Algorithms for Shipboard Antenna Design, Placement Optimization. Fort Belvoir, VA : Defense Technical Information Center, janvier 2002. http://dx.doi.org/10.21236/ada399555.

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Rasmussen, D. A., et R. L. Freeman. Design of an RF Antenna for a Large0Bore, High Power, Steady State Plasma Processing Chamber for Material Separation. Office of Scientific and Technical Information (OSTI), novembre 2001. http://dx.doi.org/10.2172/940406.

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Rasmussen, D. A., et R. L. Freeman. THE DESIGN OF AN RF ANTENNA FOR A LARGE-BORE, HIGH POWER, STEADY STATE PLASMA PROCESSING CHAMBER FOR MATERIAL SEPARATION - CRADA FINAL REPORT for CRADA Number ORNL00-0585. Office of Scientific and Technical Information (OSTI), novembre 2001. http://dx.doi.org/10.2172/1134263.

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Doerry, Armin Walter. SAR processing with stepped chirps and phased array antennas. Office of Scientific and Technical Information (OSTI), septembre 2006. http://dx.doi.org/10.2172/893561.

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