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GLOBECOM
2006
IEEE

Investigation of Error Floors of Structured Low-Density Parity-Check Codes by Hardware Emulation

14 years 4 months ago
Investigation of Error Floors of Structured Low-Density Parity-Check Codes by Hardware Emulation
Abstract−Several high performance LDPC codes have paritycheck matrices composed of permutation submatrices. We design a parallel-serial architecture to map the decoder of any structured LDPC code in this large family to a hardware emulation platform. A peak throughput of 240Mb/s is achieved in decoding the (2048,1723) Reed-Solomon based LDPC (RS-LDPC) code. Experiments in the low bit error rate (BER) region provide statistics of the error traces, which are used to investigate the causes of the error floor. In a low precision implementation, the error floors are dominated by the fixed-point decoding effects, whereas in a higher precision implementation the errors are attributed to special configurations within the code, whose effect is exacerbated in a fixed-point decoder. This new characterization leads to an improved decoding strategy and higher performance.
Zhengya Zhang, Lara Dolecek, Borivoje Nikolic, Ven
Added 11 Jun 2010
Updated 11 Jun 2010
Type Conference
Year 2006
Where GLOBECOM
Authors Zhengya Zhang, Lara Dolecek, Borivoje Nikolic, Venkat Anantharam, Martin J. Wainwright
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