Advanced Hybrid Information Processing. First International Conference, ADHIP 2017, Harbin, China, July 17–18, 2017, Proceedings

Research Article

Research on LDPC - CPM Coded Modulation Communication System

  • @INPROCEEDINGS{10.1007/978-3-319-73317-3_52,
        author={Xin Wei and Zhi-gang Li and Zheng Dou},
        title={Research on LDPC - CPM Coded Modulation Communication System},
        proceedings={Advanced Hybrid Information Processing. First International Conference, ADHIP 2017, Harbin, China, July 17--18, 2017, Proceedings},
        proceedings_a={ADHIP},
        year={2018},
        month={2},
        keywords={CPM LDPC SOVA},
        doi={10.1007/978-3-319-73317-3_52}
    }
    
  • Xin Wei
    Zhi-gang Li
    Zheng Dou
    Year: 2018
    Research on LDPC - CPM Coded Modulation Communication System
    ADHIP
    Springer
    DOI: 10.1007/978-3-319-73317-3_52
Xin Wei1,*, Zhi-gang Li1, Zheng Dou1
  • 1: Harbin Engineering University
*Contact email: weixin@hrbeu.edu.cn

Abstract

In order to improve the performance of communication system, using integrated coding and modulation process to balance the design, but after trying, we find it difficult to meet the expected requirements, so joint coding modulation came into being. Continuous phase modulation is a kind of constant-envelope modulation schemes with continuous phase which provides good spectral and power efficiency. In this paper, a continuous phase code modulation system based on soft information propagation is proposed. At first, it decodes the CPM by Soft-out Viterbi Algorithm (SOVA), and then uses the soft belief and the hard decision as the input of the LDPC decoder, and finally gets the simulation results. The simulation results show that the method can reach the performance close to the Shannon limit.