The Journal of China Universities of Posts and Telecommunications ›› 2020, Vol. 27 ›› Issue (5): 47-54.doi: 10.19682/j.cnki.1005-8885.2020.0022

Special Issue: 人工智能专题

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MIMO-FSK non-coherent detection with spatial multiplexing in fast-fading environment

Zheng Lin, Wang Zhen, Chen Jianmei, Lin Mengying, Deng Xiaofang   

  1. Guilin University of Electronic Technology Science and Technology on Communication Networks Laboratory
  • Received:2019-11-22 Revised:2020-04-13 Online:2020-10-22 Published:2020-10-23
  • Supported by:

    the National Natural Science Foundation of China, the Guangxi Key Research and Development Plan

Abstract: Accurate estimationand real-time compensation for phase offset and Doppler shift are essential for coherent multi-input multi-output (MIMO) systems. Here, a spatial multiplexing MIMO scheme with non-coherent frequency-shift keying (FSK) detection is proposed. It is immune to random phase interference and Doppler shift while increasing capacity. It is valuable that the proposed spatial multiplexing MIMO based on energy detection (ED) is equivalent to a linear system, and there is no mutual interference caused by the product of simultaneous signals in square-law processing. The equivalent MIMO channel model is derived as a real matrix, which remains maximal multiplexing capacity and reduces the channel estimation complexity. Simulation results show that the proposed scheme has outstanding performance over Rician flat fading channel, and experimental system obtains four times the capacity through 4 antennas on both transmitter and receiver.

Key words: non-coherent MIMO, MIMO-FSK, spatial multiplexing, experimental system

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