Academic literature on the topic 'COFDM'
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Journal articles on the topic "COFDM"
Zou, W. Y., and Yiyan Wu. "COFDM: an overview." IEEE Transactions on Broadcasting 41, no. 1 (March 1995): 1–8. http://dx.doi.org/10.1109/11.372015.
Full textLedoux, B. "COFDM-6 field tests." IEEE Transactions on Consumer Electronics 42, no. 3 (1996): 270–73. http://dx.doi.org/10.1109/30.536047.
Full textO'Leary, S. "Hierarchical transmission and COFDM systems." IEEE Transactions on Broadcasting 43, no. 2 (June 1997): 166–74. http://dx.doi.org/10.1109/11.598365.
Full textSharma, Hemant Kumar, Sanjay P. Sood, and Balwinder Singh. "Design of COFDM Transceiver Using VHDL." International Journal of Computer Applications 5, no. 7 (August 10, 2010): 11–15. http://dx.doi.org/10.5120/926-1304.
Full textBo, A. I., G. E. Jian-hua, and W. Yong. "Symbol Synchronization Technique in COFDM Systems." IEEE Transactions on Broadcasting 50, no. 1 (March 2004): 56–62. http://dx.doi.org/10.1109/tbc.2004.823835.
Full textLiu, Xian, and Hsiao-Chun Wu. "Novel Asterisk 16QAM Constellation for COFDM." IEEE Communications Letters 14, no. 7 (July 2010): 596–98. http://dx.doi.org/10.1109/lcomm.2010.07.100372.
Full textOkada, M., and S. Komaki. "Pre-DFT combining space diversity assisted COFDM." IEEE Transactions on Vehicular Technology 50, no. 2 (March 2001): 487–96. http://dx.doi.org/10.1109/25.923060.
Full textJu, S. M., and S. H. Leung. "Clipping on COFDM with phase on demand." IEEE Communications Letters 7, no. 2 (February 2003): 49–51. http://dx.doi.org/10.1109/lcomm.2002.808399.
Full text-POULLIN, Dominique. "L'utilisation active des COFDM en radar multistatique." Revue de l'Electricité et de l'Electronique -, no. 01 (2006): 36. http://dx.doi.org/10.3845/ree.2006.003.
Full textSung, Tae-Kyung, Dong-Seek Kim, and Hyung-Rae Cho. "A study on Performance Analysis of COFDM System using PAR Reduction Method." Journal of Korean navigation and port research 29, no. 3 (April 1, 2005): 245–50. http://dx.doi.org/10.5394/kinpr.2005.29.3.245.
Full textDissertations / Theses on the topic "COFDM"
Miller, Robin J. "COFDM for HF digital broadcasting." Thesis, University of Brighton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287067.
Full textWright, Alexander Richard. "Adaptive compensation techniques in COFDM direct conversion receivers." Thesis, Imperial College London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429872.
Full textZhang, Xu. "Modeling & Performance Analysis of QAM-based COFDM System." University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1310148963.
Full textSkrzypczak, Alexandre, Alain Thomas, and Guillaume Duponchel. "Paradigms Optimization for a C-Band COFDM Telemetry with High Bit Efficiency." International Foundation for Telemetering, 2013. http://hdl.handle.net/10150/579655.
Full textSystems using single carrier modulations for flight test transmissions perfectly fit noisy and time selective channels. However, the densification of the airport environment now makes the aero channel also frequency selective due to multiple reflections on surrounding buildings, especially while taxiing and taking off. Obviously, this has a direct consequence on hardware resources and user data rates. In such a context, COFDM represents an appealing solution thanks to its inherent robustness to multipath fading channels. But a direct application of an off-the-shelf COFDM standard is not straightforward as these standards are designed for specific channels whose characteristics are quite different from the aero one. That is why we made an experiment at Toulouse-Blagnac airport to jointly sound the channel and qualify a COFDM waveform. This paper then describes the construction of the waveform and the results of the channel sounding. From this, different standard paradigms are compared.
SILVA, J. A. L. "Analise de Desempenho de um Sistema COFDM para Comunicação Via Rede Elétrica." Universidade Federal do Espírito Santo, 2006. http://repositorio.ufes.br/handle/10/4039.
Full textA popularização da Internet demanda por tecnologias de acesso que barateiam a instalação e provisão de seus serviços. A tecnologia PLC (Power Line Communication) é uma alternativa que dispõe de infra-estrutura universalmente pronta, uma vez que utiliza a rede de distribuição de energia elétrica como meio de comunicação. Por outro lado, a sua hostilidade perante a transmissão de dados requer o conhecimento detalhado de propriedades relacionadas à função de transferência e ao cenário dos ruídos intrínsecos, para a consignação do adequado sistema de comunicação. Esta dissertação de mestrado investiga a comunicação multiportadora OFDM (Orthogonal Frequency Division Multiplexing) em um canal PLC de acesso e um canal medido em uma rede montada para fins de implantação de uma rede doméstica. Além disso, é realizada uma análise comparativa em termos de taxa de erro de bits BER (Bit Error Rate) e relação de potência de sinal e potência de ruído SNR (Signal to Noise Ratio) entre o sistema OFDM e o COFDM (Coded-OFDM) de modulação codificada em treliça TCM (Trellis Coded Modulation), proposto para a correção de ruídos impulsivos medidos em redes domésticas. Por fim, é avaliado o desempenho de um simples equalizador de um tap aplicado no sistema multiportadora para resolução de problemas de atenuação e multipercurso dos canais PLC usados. As simulações realizadas ilustraram ganhos na SNR de até 8 dB para os sistemas OFDM que conjugaram a codificação TCM e equalização de um atraso.
Fréaud, Gilles. "C Band Telemetry at Airbus Flight Test Centre." International Foundation for Telemetering, 2014. http://hdl.handle.net/10150/578367.
Full textAirbus is authorized to use S-band for Telemetry transmission until 2015. In October 2011, the decision was taken to move to C-band in 2013, to cope with Airbus development aircraft planning. The objective was a real challenge for 2 main reasons: C-band channel was not characterized in Airbus transmission environment and it was necessary to validate the propagation performance for Flight Tests uses. The selected solution is based on Coded Orthogonal Frequency Division Multiplexing (COFDM) modulation. There was no existing solution so it has led the Airbus Test Centre to drive the development of its own C Band solution. C-band telemetry at Airbus has been tested and evaluated in flight from April 2012. The first goal was to check the coverage and the impact of the bad weather condition. Besides, it was necessary to characterize the channel to choose the optimised parameters for the waveform in the Toulouse Blagnac environment. This selection of parameters allows the high quality and increased data rate required for Airbus Telemetry to be reached. The test results consolidated the choice of a COFDM modulation, when given the high sensitivity to multipath of usual Frequency Modulation in the airport environment full of buildings and aircrafts. Moreover, it has been possible to reach a similar quality to the S-band telemetry systems, thanks to a fine tuning of the waveform parameters, and tracking system. Deployment of the system by modifying 8 reception antennas and 12 development aircrafts was done over a span of 4 weeks in January 2014. No impact on Airbus A350 certification campaign occurred due to close collaboration with Flight Test Operations. The new Telemetry system enables an increase of telemetry capabilities in the future, especially the data throughput, simplified remote control and monitoring. This experience is an opportunity to set up a new standard.
Ferré, Pierre. "Cross-layer analysis for video transmission over COFDM-based wireless local area networks." Thesis, University of Bristol, 2006. http://hdl.handle.net/1983/6f02ae0e-1db0-4d4f-afb9-8f359af4eb46.
Full textBouquet, Emmanuel Daniel Raymond. "Conception et Réalisation d’un Modem Radio COFDM dans la Bande des 2. 45 GHz." Rennes, INSA, 2006. https://tel.archives-ouvertes.fr/tel-00132623.
Full textThis PhD thesis work concerns the design of a wireless COFDM modem suited for the ADVANTEN company applications. A study of the propagation channel and the OFDM modulation is presented in the first chapter. In the second chapter, synchronization and channel estimation techniques are given. The control of these techniques is necessary in order to guarantee the good working of our wireless modem in the disturbed propagation channel we have to deal with. A solution suited to our needs is selected and parameterized in this chapter. In the continuation of the study, channel coding algorithms are compared. We show how the wireless link quality is improved by using them. Convincing simulation results are presented. The Peak-to-Average Power Ratio problem related to OFDM signals is exposed. An innovative solution to reduce this ratio is proposed. Finally, we give in chapter five some results obtained from the carrying out of the RF electronic card
Campos, Fabrício Pablo Virgínio de. "Análise de desempenho de sistema clustered-COFDM para a transmissão de dados via rede elétrica." Universidade Federal de Juiz de Fora (UFJF), 2007. https://repositorio.ufjf.br/jspui/handle/ufjf/4152.
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Made available in DSpace on 2017-04-24T16:57:44Z (GMT). No. of bitstreams: 1 fabriciopablovirginiodecampos.pdf: 1190225 bytes, checksum: 6bd805e035e5d8b4716929ad23f416a2 (MD5) Previous issue date: 2007-08-27
Nesta dissertação, é discutido e analisado o uso de sistemas COFDM (Coded-Ortogonal Frequency Division Mulitplexing) para aplicações de transmissão banda-larga de dados via rede elétrica (Power Line Communications -PLC) de baixa tensão externa. A partir desta discussão e análise, o uso de sistemas clustered-COFDM é proposto e, a seguir, analisado para minimizar os efeitos devido à presença de ruídos impulsivos e a ocorrência de nulos espectrais nas respostas em frequência dos modelos lineares e invariantes no tempo das redes elétricas de baixa tensão, os quais são derivados para aplicações de transmissão de dados. A principal diferença entre os sistemas COFDM e clustered-COFDM é que o segundo é um conjunto de sistemas COFDM com menor número de sub-portadoras operando em paralelo e na mesma banda de frequência de operação do sistema COFDM. A comparação de desempenho dos sistemas COFDM e clustered-COFDM sob as mesmas condições de operação é apresentada quando o transmissor dispõe de informações parciais e completas do canal de comunicação. Aqui, é denominado informações parciais o conhecimento da distância entre o transmissor e o receptor e, desta forma, a abordagem para simulação é a mesma implementada em sistemas multi-portadoras aplicados para a comunicação sem fio. Por outro lado, as informações completas do canal estão associadas ao conhecimento das relações sinal-ruído (Signal to Noise Ratio - SNR) nas sub-portadoras pelo transmissor e, neste contexto, tem-se a abordagem de simulação aplicada a sistemas multi-portadoras para comunicação via cabos. Os resultados obtidos em ambas as abordagens de simulação revelam que, em relação ao sistema COFDM, o sistema clustered-COFDM reduz a taxa de bits errados (Bit Error Ratio - BER) quando as informações parciais do canal são disponíveis. Quando as informações completas do canal de comunicação são disponíveis, o sistema clustered-COFDM é capaz de não apenas reduzir a BER, mas também de aumentar a taxa de transmissão. Assim sendo, é possível concluir, através dos resultados de simulação indicados, que o sistema clustered-COFDM é o mais apropriado para aplicações PLC.
In this dissertation, is discussed and analyzed the use of coded- ortogonal frequency division multiplexing (COFDM) for broadband data transmission through outdoor low-voltage power electric network (Power Line Communications - PLC). Based on such discussion and analysis, the use of clustered-COFDM system is proposed and investigated to minimize the effects due to the presence of impulsive noise and the occurrence of spectral nulls in the frequency response of linear and time-invariant channels models of low-voltage electric networks, which are derived for data transmission applications. The main difference between COFDM and clustered-COFDM system is that the latter is a set of COFDM systems with a reduced number of tones that operates in parallel and in the same frequency band of operation of the COFDM system. A performance comparison between COFDM and clustered-COFDM systems under the same operation condition and when the transmitter makes use of partial and complete information of the channel is presented. Here, the term partial information means that the distance from the transmitter to the receiver is available. In this situation, the approachfor simulation is the same implemented to mutlicarrier systems applied to wireless communication. On the other hand, the term complete information about the channel is associated with the availability of each tone’s SNR (Signal to Noise Ratio) at the transmitter side. In this context, the approach for simulation is the one applied to multicarrier systems for wireline communications. The results obtained with simulations reveal that the clustered-COFDM offer lower BER (Bit Error Ratio) than the COFDM when partial information about the channel is available. If complete information of the channel is available, the clustered-COFDM allows lower BER and higher data transmission than the COFDM. Based on the simulation results, we conclude that the clustered-COFDM system is more appropriate that the COFDM one for PLC applications.
Bouquet, Emmanuel. "Conception et réalisation d'un modem radio COFDM dans la bande des 2.45GHz pour des applications à forte mobilité." Phd thesis, INSA de Rennes, 2006. http://tel.archives-ouvertes.fr/tel-00132623.
Full textLe premier chapitre est consacré à l'étude des canaux de propagation et aux caractéristiques de la modulation OFDM.
Dans le second chapitre, des techniques de synchronisation du récepteur et d'estimation de canal sont présentées. La sélection et le dimensionnement d'une solution adaptée au besoin spécifique sont effectués dans ce chapitre.
Dans la suite de l'étude, des algorithmes de codage de canal sont comparés. Nous montrons comment ils permettent une amélioration notable de la qualité de la liaison radio. Des résultats de simulation convaincants sont présentés.
Le problème du rapport puissance instantanée à puissance moyenne des signaux OFDM est exposé. Une solution innovante pour réduire ce rapport est proposée.
Enfin, les résultats de la phase de réalisation du modem sont donnés dans le chapitre cinq.
Books on the topic "COFDM"
Consultants, Woods Gordon Management. Étude de faisabilité portant sur un nouveau centre francophone: Annexes, août 1987 : un rapport de = Feasiblity [sic] study for a new francophone centre : appendices, August 1987 : a report from. [Toronto]: Woods Gordon Management Consultants, 1987.
Find full textConsensus-oriented decision-making: The CODM model for facilitating groups to widespread agreement. Gabriola, B.C: New Society Publishers, 2011.
Find full textLee, M. B. R. Predicted coverage of a COFDM single frequency network for UHF digital terrestrial TV broadcasting. British Broadcasting Corporation, Department of Research, 1993.
Find full textOntario Training and Adjustment Board., ed. Annual report: OTAB : 1994 = Rapport annuel : COFAM : 1994. Toronto: Ontario Training and Adjustment Board, 1994.
Find full textBook chapters on the topic "COFDM"
Levrier, Philippe. "COFDM Modulation." In Telecommunications, 250–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-85138-4_22.
Full textFischer, Walter. "Coded Orthogonal Frequency Division Multiplex (COFDM)." In Digitale Fernseh- und Hörfunktechnik in Theorie und Praxis, 361–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-15047-0_19.
Full textFischer, Walter. "Coded Orthogonal Frequency Division Multiplex (COFDM)." In Digital Video and Audio Broadcasting Technology, 399–424. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-32185-7_19.
Full textFischer, Walter. "Coded Orthogonal Frequency Division Multiplex (COFDM)." In Digital Video and Audio Broadcasting Technology, 345–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11612-4_19.
Full textFischer, Walter. "Coded Orthogonal Frequency Division Multiplex (COFDM)." In Digitale Fernseh- und Hörfunktechnik in Theorie und Praxis, 417–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-53896-4_19.
Full textHu, Shuanlei, and Lianxiang Zhu. "Performance of Low-Density Lattice Codes in COFDM Systems." In Lecture Notes in Electrical Engineering, 343–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-34528-9_36.
Full textAndreoli, S., P. Banelli, A. Longaroni, and C. Massini. "Non Linear Distortions introduced by Amplifiers on COFDM signals. Measurements, Effects and Compensation Techniques." In Broadband Wireless Communications, 116–24. London: Springer London, 1998. http://dx.doi.org/10.1007/978-1-4471-1570-0_12.
Full textGouable, Rodolphe Le, and Maryline Helard. "Comparison of MC-CDMA and COFDM/TDMA Techniques Taking into Account the System Load for Wireless Indoor Communications." In Multi-Carrier Spread-Spectrum & Related Topics, 165–72. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4757-3569-7_17.
Full textWang, Xu, Guangming Xiong, Yang Sun, Peng Liu, Weilong Song, and Yang Xu. "Development and Implementation of Real-Time Wireless Monitor System Using COFDM for the Competition of Intelligent Vehicles in China." In Communications in Computer and Information Science, 591–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31965-5_69.
Full textSingh, Satnam, and Neeraj Sharma. "Performance Analysis of COADM-Based Transparent Optical Network." In Advances in Intelligent Systems and Computing, 753–60. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-5903-2_77.
Full textConference papers on the topic "COFDM"
Britkov, A. V., O. S. Nosov, S. A. Dementenko, Ph A. Rakitjanskiy, A. V. Terehov, G. G. Kondratenko, and I. S. Strybizh. "COFDM-Modulator." In 2007 17th International Crimean Conference - Microwave & Telecommunication Technology. IEEE, 2007. http://dx.doi.org/10.1109/crmico.2007.4368777.
Full textBritkov, A. V., O. S. Nosov, S. A. Dementenko, Ph A. Rakitjansky, A. V. Terehov, G. G. Kondratenko, and I. S. Strybizh. "COFDM Portable Transmitter." In 2007 17th International Crimean Conference - Microwave & Telecommunication Technology. IEEE, 2007. http://dx.doi.org/10.1109/crmico.2007.4368778.
Full textLedoux, B. "COFDM for LMCS applications." In International Broadcasting Conference (IBC). IEE, 1997. http://dx.doi.org/10.1049/cp:19971246.
Full textYauHo Joe Choi. "Single chip COFDM receiver." In International Broadcasting Conference (IBC). IEE, 1997. http://dx.doi.org/10.1049/cp:19971345.
Full textParrado, Alexander Lopez, and Jaime Velasco Medina. "COFDM baseband processor on FPGA." In 2011 IEEE Second Latin American Symposium on Circuits and Systems (LASCAS). IEEE, 2011. http://dx.doi.org/10.1109/lascas.2011.5750318.
Full textBoelike, B., R. Burow, and D. Haenssgen. "The Use of COFDM for MMDS." In 28th European Microwave Conference, 1998. IEEE, 1998. http://dx.doi.org/10.1109/euma.1998.338038.
Full textde Campos, Fabricio P. V., Carlos A. Duque, Augusto S. Cerqueira, and Moises V. Ribeiro. "Clustered-COFDM for Broadband PLC Systems." In 2007 IEEE International Symposium on Power Line Communications and Its Applications. IEEE, 2007. http://dx.doi.org/10.1109/isplc.2007.371126.
Full textDemeure, C. J. "COFDM modem for terrestrial radio broadcasting." In 8th International Conference on High-Frequency Radio Systems and Techniques. IEE, 2000. http://dx.doi.org/10.1049/cp:20000148.
Full textZhu, HongLi, GuangChun Gao, and Gang Bi. "A Useful COFDM Demodulator for DVB-T." In 2009 Second International Workshop on Knowledge Discovery and Data Mining (WKDD). IEEE, 2009. http://dx.doi.org/10.1109/wkdd.2009.197.
Full textZongqiang, Li. "Synchronization Scheme for DVB-T COFDM System." In 2012 International Conference on Computer Science and Electronics Engineering (ICCSEE). IEEE, 2012. http://dx.doi.org/10.1109/iccsee.2012.403.
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