Computer Science

Computer Science ›› 2025, Vol. 52 ›› Issue (6A): 240900128-4.doi: 10.11896/jsjkx.240900128

• Network & Communication • Previous Articles     Next Articles

Study on Multi-antenna Amplitude-Phase Difference Joint Modulation

ZHANG Lulin, ZHENG Xing, PENG Yuhui, XIANG Nantian, SHI Changhan, SU Jiangtao   

  1. Key Laboratory of RF Circuits and Systems of Ministry of Education,Hangzhou Dianzi University,Hangzhou 310018,China
  • Online:2025-06-16 Published:2025-06-12
  • About author:ZHANG Lulin,born in 1999,postgraduate.His main research interests include channel estimation and equalization of wireless communication.
    ZHENG Xing,born in 1983,associate professor.His main research interests include high-speed optical communication and OFDM technology.

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Abstract: MIMO system,a pivotal technology in 5G communication,offers spatial diversity and spatial multiplexing capabilities for wireless communication,which can significantly enhance communication quality.However,this technique also makes the MIMO signal detection complicated.To mitigate the complexity of the MIMO signal detection,an amplitude-phase differential joint modulation(A-DPM) scheme is proposed.The A-DPM utilizes phase differences and amplitudes to carry information.By employing MIMO precoding and maximum ratio combining(MRC),the system enables the receiver to obtain maximum signal power.The phase differential eliminates phase rotations caused by multipath channels and singular value decomposition(SVD) precoding on symbols,while converting the time-varying phase rotation induced by residual carrier frequency offset into a non-time-varying one.Consequently,the A-DPM receiver does not require intricate MIMO channel estimation,simplifying the signal detection process.Thesimulations conducted in a multipath rayleigh channel with residual frequency offset and sampling period offset environments confirm that the multi-antenna A-DPM scheme exhibits spatial diversity effects,outperforms space-time block coding(STBC) systems in terms of bit error rate performance,and has lower demodulation complexity compared to STBC systems.

Key words: MIMO system, Signal detection, Maximum ratio combining(MRC), Precoding, Residual carrier offset, Spatial diversity

CLC Number: 

  • TN911.92
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