LDPC-SPC product codes

LDPC-SPC codes is introduced. LDPC-SPC codes choose LDPC codes as horizontal codes and single parity check (SPC) codes as vertical codes. Some decoding algorithms are also given, including algorithms based on hard decision and soft decision. By these algorithms, each bit of every LDPC code can get extrinsic messages from other LDPC code words to help LDPC decoder decode successfully. Based on the LDPC code which is half rate and 8064 bits long, a LDPC-SPC code is constructed. Simulation results show that the LDPC-SPC codes can lower the error floor of the LDPC codes and have better BER (Bit Error Ratio) performance. When BER is 10-7, the performance of the LDPC-SPC codes is 0.3 dB better than the LDPC codes.EI0193-974