Joint and iterative detection and decoding of differentially encoded COFDM systems (original) (raw)
2010, 2010 17th International Conference on Telecommunications
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The research and development of OFDWCOFDM for digital television broadcasting has received considerable attention and has made a great deal of progress in Europe. OFDWCOFDM has already been implemented in digital audio broadcasting and is being considered for terrestrial digital television and HDTV broadcasting. The advantages of COFDM claimed by the advccates in Europe have also caught the attention of U.S. broadcasters and generated enthusiasm although a digital modulation technique called 8-VSB has been selected by the FCC Advisory Committee on Advanced Television Service (ACATS) for the final testing. There is considerable debate in the industry over the use of COFDM vs. VSB or QAM for terrestrial HDTV broadcasting.
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This paper investigates different methods of exploiting the Channel State Information (CSI) available at the receivers of Coded Orthogonal Frequency Division Multiplexing (COFDM)based wireless communications systems in the equalisation, demodulation and/or decoding processes. The optimal method to be used is defined theoretically and computer simulations prove that the selected method outperforms the other methods by more than 5 dB SNR at 10 -3 BER.
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