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Low Complexity X-EMS Algorithms for Nonbinary LDPC Codes

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4 Author(s)
Xiao Ma ; Department of Electronics and Communication Engineering, Sun Yat-sen University, Guangzhou 510275, China. ; Kai Zhang ; Haiqiang Chen ; Baoming Bai

The extended min-sum (EMS) algorithm is redescribed 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.

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IEEE Transactions on Communications  (Volume:60 ,  Issue: 1 )