A two stage belief-propagation(TSBP)decoding algorithm was developed based on trapping set state(TSS)detection to reduce the error floor of low-density parity-check(LDPC)codes.

• 为了降低低密度奇偶检验码的误码平底,提出一种基于陷阱集状态检测的两级置信度传播译码算法。