Publication date: Available online 11 September 2015
Source:Physical Communication
Author(s): Xiying Liu, Shancheng Zhao, Xiao Ma
This paper studies the combination of non-binary low-density parity-check (NB-LDPC) codes and -ary partial response continuous phase modulation (PRCPM). A low-complexity joint detection/decoding algorithm is proposed, which is referred to as the Max-Log-MAP/-EMS algorithm. In this joint algorithm, the CPM detector is implemented by the Max-Log-MAP algorithm while the LDPC decoder is implemented by the Extended Min-Sum (EMS) algorithms. Three kinds of EMS algorithms, including -EMS, -EMS, and -EMS algorithms, are compared, which are referred to as -EMS algorithm for convenience. Simulation results show that the Max-Log-MAP/-EMS algorithm performs as well as the traditional iterative detection/decoding algorithm based on the BCJR algorithm and the QSPA algorithm, but with lower complexity. In addition, comparison of the proposed NB-LDPC coded PRCPM system with the eBCH coded PRCPM system is given, which shows the performance advantages of our system.
Source:Physical Communication
Author(s): Xiying Liu, Shancheng Zhao, Xiao Ma