Computer Science

Computer Science ›› 2023, Vol. 50 ›› Issue (11): 327-332.doi: 10.11896/jsjkx.220900103

• Computer Network • Previous Articles     Next Articles

Joint Layered Message Passing Detection for Multi-user Large-scale LDPC-SM-MIMO System

ZOU Xin, ZHANG Shunwai   

  1. College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China
  • Received:2022-09-13 Revised:2023-06-09 Online:2023-11-15 Published:2023-11-06
  • About author:ZOU Xin,born in 1997,postgraduate.His main research interests include massive multiple input multiple output and low-density parity-check codes.ZHANG Shunwai,born in 1987,asso-ciate professor.His main research interests include advanced channel co-ding and cooperative communications.
  • Supported by:
    Natural Science Foundation of Jiangsu Higher Education Institutions(20KJB510034),Open Research Fund of Key Lab of Broadband Wireless Communication and Sensor Network Technology(Nanjing University of Posts and Telecommunications),Ministryof Education(JZNY202112) and NUPTSF(NY219073).

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Abstract: Message passing detection(MPD) is the most commonly used detection algorithm in multi-user large-scale spatial mo-dulation multi-input multi-output(SM-MIMO) systems,but the traditional MPD algorithm is still complex.To overcome this pro-blem,the layered MPD(LMPD) algorithm isused to accelerate the convergence speed of the algorithm.Then,low-density parity-check(LDPC) codes are combined with SM-MIMO systems,and a joint LMPD-belief propagation(JLMPD-BP) algorithm in which the LMPD can use the feedback information of BP decoding is proposed to further improve the system detection perfor-mance.Theoretical analysis and simulation results show that,compared with the traditional MPD algorithm,the LMPD algorithm accelerates the convergence speed of the algorithm without losing the bit error rate(BER) performance.For example,when the signal-to-noise ratio is 4 dB,LMPD algorithm need only 2 iterations,while MPD algorithm need 3 iterations.At the same time,thanks to the great advantages of LDPC codes,JLMPD-BP algorithm greatly reduces BER of the system.When the iteration number is (2,2,2) and SNR=2 dB,compared with LMPD-BP algorithm with iteration (4,4,0),the BER of JLMPD-BP algorithm deceases from 10－2 to 5×10－3.

Key words: Layered message passing detection, Spatial modulation, Large-scale MIMO, Low-density parity-check code, Belief propagation

CLC Number: 

  • TN929.5
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