Article,

Performance Analysis of Steepest Descent Decoding Algorithm for LDPC Codes

(Eds.)
Int. J. on Recent Trends in Engineering and Technology,, 9 (1): 6 (July 2013)

Abstract

Among various hard decision based Bit Flipping (BF) algorithms for decoding Low-Density Parity-Check (LDPC) codes such as Weighted Bit Flipping (WBF), Improved Reliability Ratio Weighted Bit Flipping (IRRWBF) etc., the Steepest Descent Bit Flipping Algorithm (SDBF) achieves better error performance. In this paper, the performance of the Steepest Descent Algorithm for both single steepest descent and Multi steepest descent modes is analysed. Also the performance of IEEE 802.16e standard is analysed using Steepest Descent Bit Flipping (SDBF) decoding algorithm. SDBF requires fewer check node and variable node operations compared to Sum Product Algorithm (SPA) and Min Sum Algorithm (MSA). The SDBF achieves a coding gain of 0.1 ~ 0.2 dB compared to Single-SDBF without requiring complex log and exponential operations.

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