Dissertations / Theses on the topic 'Bi-directional communications'
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Wang, Shih-Cheng. "Alignment tolerant, single-fiber, bi-directional link." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/13841.
Full textOkumura, Ryota. "Efficient Bi-Directional Communications for Low-Power Wireless Mesh Network." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263789.
Full text新制・課程博士
博士(情報学)
甲第23328号
情博第764号
新制||情||130(附属図書館)
京都大学大学院情報学研究科通信情報システム専攻
(主査)教授 原田 博司, 教授 守倉 正博, 教授 大木 英司
学位規則第4条第1項該当
Doctor of Informatics
Kyoto University
DFAM
Akanbi, Oladeji Bamidele. "Bi-directional Dense Wavelength Division Multiplexed Systems for Broadband Access Networks." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/13964.
Full textGeddis, Demetris Lemarcus. "Single fiber bi-directional OE links using 3D stacked thin film emitters and detectors." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04082004-180141/unrestricted/geddis%5Fdemetris%5Fl%5F200312%5Fphd.pdf.
Full textSivaSiva, Ganesan Rakash [Verfasser], Anja [Akademischer Betreuer] Klein, and Tobias [Akademischer Betreuer] Weber. "Relay-aided interference alignment for bi-directional communications in wireless networks / Rakash SivaSiva Ganesan. Betreuer: Anja Klein ; Tobias Weber." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2015. http://d-nb.info/1111113394/34.
Full textNdiaye, Fatou. "Proof-of-Concept of Bi-directional Broadcast Communication." Thesis, KTH, Kommunikationsteori, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104001.
Full textOung, Kar Boon. "Application of OFDM in broadcasting and bi-directional communication systems." Thesis, University of Leeds, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396907.
Full textSmendziuk, Christopher Michael. "Bi-directional gap junction-mediated soma-germline communication during Drosophila spermatogenesis." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57897.
Full textMedicine, Faculty of
Graduate
Kamsula, P. (Pekka). "Design and implementation of a bi-directional visible light communication testbed." Master's thesis, University of Oulu, 2015. http://jultika.oulu.fi/Record/nbnfioulu-201502141097.
Full textAscano, Janice Mae. "JAGGED1 Mediates Bi-Directional Cell-Cell Communication: Implications in Carcinogenesis and Thymic Development." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1109018032.
Full textAscano, Janice M. "Jagged 1 mediates bi-directional cell-cell communication implications in carcinogenesis and thymic development /." Cincinnati, Ohio : University of Cincinnati, 2005. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1109018032.
Full textChook, Kim. "Whose Tube: Examining Youtube Power Structures Through A Discourse Analysis of Blogilates." Thesis, Boston College, 2017. http://hdl.handle.net/2345/bc-ir:107935.
Full textThis study examined the influence of a popular Youtuber in creating social discourse surrounding concepts of health, fitness, and beauty, employing a case study approach of the popular Youtube channel, Blogilates. Both visual and rhetorical analyses were conducted on the titles and thumbnail images of the top 50 most viewed Blogilates videos, and 10 videos were studied in depth. The findings established the concept of a unique power relationship between Youtubers and their viewers, which also explains the marked dissonance between the discourse posited by the channel’s marketing and the discourse posited in the actual video content
Thesis (BA) — Boston College, 2017
Submitted to: Boston College. College of Arts and Sciences
Discipline: Departmental Honors
Discipline: Communication
Bhattacharya, Sumit. "A Real-Time Bi-Directional Global Positioning System Data Link Over Internet Protocol." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1121355433.
Full textVahidnia, Reza. "Asynchronous bi-directional relay-assisted communication networks." Diss., 2014. http://hdl.handle.net/10155/430.
Full textSivaSiva, Ganesan Rakash. "Relay-aided interference alignment for bi-directional communications in wireless networks." Phd thesis, 2015. http://tuprints.ulb.tu-darmstadt.de/4571/8/kt_thesis.pdf.
Full textQiu, D. L., and 邱東樑. "Bi-directional Secure communication system via chaotic circuit." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/09814328835624451342.
Full text國立雲林科技大學
電機工程系碩士班
90
There are three topics that are studied in this thesis. In the first topic, we emphasize on the so-called synchronization. By the Lyapunov stability theorem, a state feedback gain can be designed to guarantee the synchronization between the master and slave chaotic systems. In the second topic, the concept of the cryptology is used to enhance the performance of security in the communication by the chaotic circuits. In the third topic , we studied how to design an adative controller for hyperchaotic circuits with unknown parameters. By using the concepts of PR or hyper-minimum-phase, the adaptive controller and adaptive law can be designed. Further- more, the concepts cryptography and adaptive control law are combined to design an adaptive cryptosystem. Finally, some numerical simulations and the fabrication of the chaotic circuits were given to demonstrate the efficiency of the proposed scheme.
Fu, Bo-Sen, and 傅柏森. "Design of Bi-directional Wireless Communication for Implantable Biomicrosystem." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/40825202542107610766.
Full text國立成功大學
醫學工程研究所
91
With the advances in microelectronics, micromachining, biomaterials, and biocompatible package technology, many sensing devices can be fabricated in a miniaturized way. Various implantable sensing device modules have been developed as biological signal monitoring systems for various clinical researches in recent years. The aim of this study is to develop a wireless power and bi-directional data transmission for implantable sensing device systems. The proposed implantable sensing device takes the full advantages of wireless transmission features, including wireless transfer of power and data between the implant and an external unit. The implant receives the desirable command from external transmitter to determine the sampling rate and channel of implanted sensing module. For recording biological signals, we used differential mode instrumentation amplifier and operation amplifier to acquire the biosignals. The biological signals after differential amplification were send to analog-to-digital converter (ADC) from which and the digital data were transmitted outwards by using a passive RF telemetry link. For read-out transmission, a load shift key (LSK) approach, which allows wireless power and data transmission through the same RF link, is used in this study. We have successfully designed, implemented and tested all the functional blocks of a bi-directional implantable sensing device system. With appropriate tuning of the class-E power amplifier and modulation index, the maximal read-out transmission rate can reach around 125 kbps when the distance between the transmitter coil and receiver coil is within 4.5 cm. Within this transmission distance, lateral displacement of receiver coil is allowed as long as it is inside the area of transmitting coil. The overall implantable sensing device including the RF interface circuitry dissipates 70 mW of power from a 3-V supply and occupies 20×40 mm2 of area. This prototype of implantable sensing device has been validated in acute animal experiment and can be utilized for varied implanted applications after biocompatible packing.
Zhang, Yi-Shen, and 張伊伸. "Bi-directional Wireless Communication with Space-time Code and Network Coding." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/83238108139260878460.
Full text中原大學
電機工程研究所
97
Network coding is a technique which allows intermediate nodes to encode the input data before broadcasting the information to other neighbors. Compared with traditional network transmission, it can improve the throughput and reliability of transmission. On the other hand, in order to improve the performances of wireless transmission, Alamouti space-time block code is also widely used. It uses multiple antennas to transmit messages simultaneously to achieve better performances. In 2008, Chau Yuen, etc., proposed a scheme which combines network coding with space-time code to improve the performances of transmission in bi-directional wireless communication. They analyze Amplify-and-Forward (AF) and Decode-and-Forward (DF) methods with and without channel state information (CSI). The simulations are based on schemes which have two antennas at the relay, and a single antenna at the source and destination. In this thesis, we make a further analysis and discussion based on Chau Yuen's scheme. We study the schemes which have three or four antennas at the relay. According to our simulations, we conclude that by using multi-antennas in Decode-and-Forward (DF) case, the transmission performances can be further improved.
Li, Shyh-Chyang, and 李世強. "VLSI Implementation of Wireless Bi-directional Communication Circuits for Micro-stimulator." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/p5ft7d.
Full text國立成功大學
醫學工程研究所碩博士班
90
Various implantable bio-microsystems have been designed for the neural prostheses and other clinical studies. For the implantable bio-microsystem, power is one of the major concerns in the system design. Due to the lifetime limitation, battery is not the optimal choice in the implanted devices. In recent years, electromagnetic propagation through inductive coupling links has been commonly used to deliver power and information into these implantable bio-microssytems. Another issue is the outward transmission of sensing data, which requires an internal data transmission system with the power acquired from the external controller. The aim of this study is to investigate the functional blocks needed for a wireless bi-directional transmission micro-stimulator and present their simulation results. This implantable device includes internal RF front-end circuit, control circuit, stimulator, and on-chip transmitter. The operation of this system is to receive an AM modulated 2MHz signal generated by external circuits. This signal includes the power and data necessary for the whole internal circuits. Through the internal circuits, a stable DC voltage and digital data can be extracted for neuromuscular stimulation. Besides, the system can acquire the biological sensing signal for on-chip transmission. In this study, most of the functional blocks for the implantable device can be verified by using Hspice according to the design rules of TSMC 0.25 um CMOS process. Our simulating results show that the RF front-end circuits can provide a stable 2.5V DC voltage and extract digital data accurately. Meanwhile, in the signal process circuits, the preamplifier can provide a stable gain for bio-signals (about 40dB to 60dB). The bandpass filter with bandwidth between 250Hz to 5KHz filter circuit is designed with ladder type approach. Finally, an accurate A/D data converter with 8-bitresoultion of successive approximation register (SAR) has been verified too. All the simulating results can be a base for future fabrication of implantable devices.
Pan, I.-Kai, and 潘奕凱. "Reflection Volume Holographic Bi-directional Wavelength-Division Multi/Demultiplexers for Optical Communication." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/08627289598145001315.
Full text國立交通大學
光電工程所
89
From the coupled-wave theory, it is obvious that the diffraction efficiency of a reflection-type volume hologram depends on the thickness, the average refraction index, the modulation refraction index of the recording material, and the reconstructed wavelength. Under optimal conditions, a reflection volume holographic element with maximum diffraction efficiency for a chosen wavelength, and minimum diffraction efficiency for another chosen wavelength is designed. Consequently, it can be used as a bi-directional wavelength-division multiplexer/demultiplexer (BIDI WDM) for optical communications. In order to demonstrate its feasibility, silver halide emulsions with a 5.7 m thickness and a diode-pumped solid-state laser with a 532nm wavelength are used. For experimental conveniences, 532nm and 632.8nm are chosen as two reconstructed wavelengths. Firstly, the average refraction index and the modulation refraction index of the silver halide emulsions with various exposures are measured with these reconstructed wavelengths. And their relation curves are depicted. Based on these results, the optimal exposures and its corresponding average refraction index and modulation refraction index can be obtained. Since this element is designed for BIDI WDM, any of the incident angle, the reflected angle and the diffracted angle equals 45o. Substituting these conditions into K-vector diagram, the recording geometry can be derived. Finally, an element is fabricated with the derived recording geometry and the optimal exposure. Its performance is estimated that it has transmission rates 3.979 dB and 1.549 dB for wavelengths 532nm and 632.8nm, respectively. And the elements for 1.3/1.55 m can be fabricated similarly.
Unger, Timo. "Multiple-antenna two-hop relaying for bi-directional transmission in wireless communication systems." Phd thesis, 2009. https://tuprints.ulb.tu-darmstadt.de/1401/1/Dissertation_Timo_Unger.pdf.
Full textUnger, Timo [Verfasser]. "Multiple-antenna two-hop relaying for bi-directional transmission in wireless communication systems / von Timo Unger." 2009. http://d-nb.info/99493534X/34.
Full textTsai, Yu-Chieh, and 蔡宇傑. "Design and Implementation of Controller Peripheral and Communication Interface of a Three-Phase Bi-directional Inverter System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/61719861020163370199.
Full text國立中正大學
電機工程研究所
99
This thesis presents design and implementation of the controller peripheral and communication interface of a three-phase bi-directional inverter system, which will be applied to a dc microgrid. Based on the basic concept of smart grid, peripheral and communication interfaces of a bi-directional inverter system using two microcontrollers RX62T are established. By considering further expansion, three fully developed communication interfaces, I2C, UART and SPI, are chosen, and their structure, communication principle and characteristics are analyzed and compared. In order to obtain power information and allow users to understand system operation, this study selects FRAM and SD card as memory, and Timer and LCD module as peripheral, to illustrate the communication principle and hardware architecture. Finally, this study designs the driver of peripheral and communication interfaces, which are combined with three-phase bi-directional inverter circuits to verify its correctness and feasibility.
Tsai, Ya-Huei, and 蔡雅惠. "Design and Implementation of Controller Peripheral and Communication Interface of a Single-Phase Bi-directional Inverter System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/66891912143664299845.
Full text國立中正大學
電機工程研究所
99
This thesis presents design and implementation of the controller peripheral and communication interface of a single-phase bi-directional inverter system, which is applied to a PV dc power distribution system. Based on the concept of constructing a smart grid, two microcontrollers TMS320LF2406A are adopted to realize the controller peripheral and communication interface for a single-phase bi-directional inverter system. Based on the SCI protocol combined with ZigBee or Bluetooth wireless module to achieve remote monitoring, and the SPI protocol to implement synchronous communication between the two microcontrollers, the communication principle and structure are analyzed and compared. In order to access the related information any time, an EEPROM is used as an external memory, and LCM is combined with the MPPT to display its dynamic information. Finally, the peripheral and communication interfaces combined with a single-phase bi-directional inverter were designed and implemented to verify its feasibility and accuracy.
WENG, WEN_CHU, and 翁文舉. "Design and Implementation of Bi-Directional Remote Control and Monitoring System Based on Multiple Wireless Communication Protocols." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/52592565616336109839.
Full text國立臺北科技大學
自動化科技研究所
90
This thesis develops a bi-directional remote control and monitoring system for home and office automation based on the wireless communication protocols including FLEX paging, Bluetooth, and GSM short message service (GSM SMS). In the remote control unit, the control command can be sent through either the FLEX channel or the GSM SMS provided by the GSM Module in accordance with the channel condition and communication expense. For receiving the FLEX control signals, an 8051 microprocessor-based remote controller embedded in the wireless server is implemented with a decoding scheme derived by the induction method. The remote monitoring is accomplished by informing the user the IAs’ control statuses via the GSM SMS, thereby completing the bi-directional function. To escape from the fetters of the interconnection wires, an indoor wireless communication network is established by applying Bluetooth technology. This way the message can be exchanged wirelessly between the controlled IAs and server system. Since multimedia service is one of the killer applications in the 3G wireless communications, we have also added video capability to our platform, which transmits the video of the controlled IAs to the users for monitoring. The transmitted video is compressed using the international standard H.263 video codec to achieve a very low bit rate transmission. Due to the current limited capacity of GSM system, we have not transmitted the video via GSM channel to a cellular device but rather have simulated this via the Internet to the PC terminal. However, the prototype can easily migrate to a cellular device once the 3G wideband CDMA infrastructure matures. Finally, a series of experiments are conducted where an electric fan is adopted as a control target. Experimental results verify the effectiveness of this system. This system is operated with high mobility and low communication expense and thus can be popularized easily. We expect that communication businesses will enhance their competitiveness in the mobile marketplace if they choose to apply the services suggested by this study.