TR2014-086

Turbo Demodulation for LDPC-coded High-order QAM in Presence of Transmitter Angular Skew


    •  Koike-Akino, T.; Millar, D.S.; Kojima, K.; Parsons, K.; Yoshida, T.; Ishida, K.; Miyata, Y.; Matsumoto, W.; Mizuochi, T., "Turbo Demodulation for LDPC-coded High-order QAM in Presence of Transmitter Angular Skew", European Conference on Optical Communication (ECOC), DOI: 10.1109/ECOC.2014.6964100, September 2014, pp. 1-3.
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      • @inproceedings{Koike-Akino2014sep3,
      • author = {Koike-Akino, T. and Millar, D.S. and Kojima, K. and Parsons, K. and Yoshida, T. and Ishida, K. and Miyata, Y. and Matsumoto, W. and Mizuochi, T.},
      • title = {Turbo Demodulation for LDPC-coded High-order QAM in Presence of Transmitter Angular Skew},
      • booktitle = {European Conference on Optical Communication (ECOC)},
      • year = 2014,
      • pages = {1--3},
      • month = sep,
      • doi = {10.1109/ECOC.2014.6964100},
      • url = {http://www.merl.com/publications/TR2014-086}
      • }
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  • Research Areas:

    Communications, Signal Processing


We analyze demodulation methods for high-order QAM formats in the presence of quadrature angular skew caused by imperfect biasing of the transmitter. Proposed turbo demodulation improves skew tolerance of up to 33-degree angle for an SNR penalty of 1 dB for 1024QAM.