On Performance of Multilevel Coding Schemes Based on Non-Binary LDPC Codes

Conference: European Wireless 2018 - 24th European Wireless Conference
05/02/2018 - 05/04/2018 at Catania, Italy

Proceedings: European Wireless 2018

Pages: 4Language: englishTyp: PDF

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Kruglik, Stanislav; Potapova, Valeriya; Frolov, Alexey (Skolkovo Institute of Science and Technology Moscow, Russia)

We address the problem of constructing of coding schemes for the channels with high-order modulations. It is known, that non-binary LDPC codes are especially good for such channels and significantly outperform their binary counterparts. Unfortunately, their decoding complexity is still large. In order to reduce the decoding complexity we consider multilevel coding schemes based on non-binary LDPC codes (NB-LDPC-MLC schemes) over smaller fields. The use of such schemes gives us a reasonable gain in complexity. At the same time the performance of NB-LDPC-MLC schemes is practically the same as the performance of LDPC codes over the field matching the modulation order. In particular by means of simulations we showed that the performance of NB-LDPC-MLC schemes over GF(16) is the same as the performance of non-binary LDPC codes over GF64 and GF256 in AWGN channel with QAM 64 and QAM 256 accordingly. We also perform a comparison with bitinterleaved coded modulation based on binary LDPC codes.