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Among various hard decision based Bit Flipping (BF)
algorithms for decoding LowDensity ParityCheck (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 SingleSDBF without requiring complex
log and exponential operations.
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