Controlling the Error Floor in LDPC Decoding

被引：24

作者：

Zhang, Shuai ^{[1
]}

Schlegel, Christian ^{[2
]}

机构：

[1] STAT Canada, Ottawa, ON K1A 0T6, Canada

[2] Dalhousie Univ, NSERC Ultra Maritime Digital Commun Ctr, Halifax, NS B3H 4R2, Canada

来源：

IEEE TRANSACTIONS ON COMMUNICATIONS | 2013年 / 61卷 / 09期

关键词：

Absorbing set; error floor; importance sampling; iterative decoding; low-density parity-check codes; trapping set; PARITY-CHECK CODES; FULLY ABSORBING SETS;

D O I：

10.1109/TCOMM.2013.071813.120659

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The error floor of LDPC is revisited as an effect of dynamic message behavior in the so-called absorbing sets of the code. It is shown that if the signal growth in the absorbing sets is properly balanced by the growth of set-external messages, the error floor can be lowered to essentially arbitrarily low levels. Importance sampling techniques are discussed and used to verify the analysis, as well as to discuss the impact of iterations and message quantization on the code performance in the ultra-low BER (error floor) regime.

引用

页码：3566 / 3575

页数：10

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