Non-binary LDPC-coded modulation for high-speed optical metro networks with backpropagation

Murat Arabaci; Ivan B. Djordjevic; Ross Saunders; Roberto M. Marcoccia

doi:10.1117/12.841393

22 January 2010 Non-binary LDPC-coded modulation for high-speed optical metro networks with backpropagation

Murat Arabaci, Ivan B. Djordjevic, Ross Saunders, Roberto M. Marcoccia

Proceedings Volume 7621, Optical Metro Networks and Short-Haul Systems II; 76210I (2010) https://doi.org/10.1117/12.841393
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

To simultaneously mitigate the linear and nonlinear channel impairments in high-speed optical communications, we propose the use of non-binary low-density-parity-check-coded modulation in combination with a coarse backpropagation method. By employing backpropagation, we reduce the memory in the channel and in return obtain significant reductions in the complexity of the channel equalizer which is exponentially proportional to the channel memory. We then compensate for the remaining channel distortions using forward error correction based on non-binary LDPC codes. We propose non-binary-LDPC-coded modulation scheme because, compared to bit-interleaved binary-LDPC-coded modulation scheme employing turbo equalization, the proposed scheme lowers the computational complexity and latency of the overall system while providing impressively larger coding gains.

Citation Download Citation

Murat Arabaci, Ivan B. Djordjevic, Ross Saunders, and Roberto M. Marcoccia "Non-binary LDPC-coded modulation for high-speed optical metro networks with backpropagation", Proc. SPIE 7621, Optical Metro Networks and Short-Haul Systems II, 76210I (22 January 2010); https://doi.org/10.1117/12.841393

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