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Low Complexity X-EMS Algorithms for Nonbinary LDPC Codes
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DOI：10.1109/TCOMM.2011.092011.110082.png)
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Abstract
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The extended min-sum (EMS) algorithm is re-described as a reduced-search trellis algorithm (called M-EMS algorithm). Two variants of the M-EMS algorithm, called T-EMS algorithm and D-EMS algorithm, are presented. Simulation results show that, these three algorithms (referred to as X-EMS algorithms for convenience), combined with factor correction techniques, perform almost as well as the Q-ary sum-product algorithm (QSPA) but with a much lower complexity.
Keywords:
EMS algorithms
nonbinary low-density parity-check (LDPC) codes
Q-ary sum-product algorithm (QSPA)
reduced-search trellis algorithm
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