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研究煤矿井下多径瑞利衰落信道和地表的加性高斯白噪声信道、莱斯衰落信道。通过使用MATLAB仿真软件对不同信道下的QPSK通信系统的误码率进行了分析和仿真,得出矿井下多径瑞利衰落信道的误码率要高于地表加性高斯白噪声信道和莱斯衰落信道,并严重降低通信系统性能的结论。
This paper studies the additive white Gaussian noise channel and the Rice fading channel of multipath Rayleigh fading channel and surface in coal mine. By using MATLAB simulation software to analyze and simulate the BER of QPSK communication system under different channels, it is concluded that the bit error rate of multi-path Rayleigh fading channel in mine is higher than that of Gaussian white channel with additive Gaussian noise Fading channels and severely degrading the performance of the communications system.