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We propose a maximum a posteriori probability (MAP) turbo equalizer based on the sliding-window multilevel Bahl-Cocke-Jelinek-Raviv algorithm. This scheme is suitable for simultaneous nonlinear and linear impairment mitigation in multilevel coded-modulation schemes with coherent detection. The proposed scheme employs large-girth quasicyclic LDPC codes as channel codes. We demonstrate the efficiency...
We present a PMD compensation scheme suitable for use in multilevel coded-modulation schemes, with PMD compensation efficiency comparable to that of OFDM, but with lower complexity of both transmitter and receiver. It is based on Alamouti-type polarization-time coding, with LDPC codes as channel codes.
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