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- W2099833696 abstract "We construct lattices with high coding gains based on nested low-density parity-check (LDPC) codes by Construction D'.We generalize the LDPC lattices [1] to have irregular degrees and call them irregular LDPC lattices. To construct good irregular LDPC lattices, we optimize the degree distributions by using density evolution and a modified sequential quadratic programming (SQP) and show our optimized irregular LDPC lattice has a threshold 0.48 dB from the capacity, which is about 0.6 dB better than the regular one in [1]. To construct a Tanner graph corresponding to LDPC lattices, we generalize the progressive-edge growth (PEG) algorithm and show a lower bound on the girth of the graph. Simulation is performed using the sum-product algorithm. Also, we compare the performance of joint decoding and multi-stage decoding [2] and show the advantage of joint decoding." @default.
- W2099833696 created "2016-06-24" @default.
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- W2099833696 date "2008-07-01" @default.
- W2099833696 modified "2023-09-25" @default.
- W2099833696 title "Irregular low-density parity-check lattices" @default.
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- W2099833696 doi "https://doi.org/10.1109/isit.2008.4595437" @default.
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