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对单音干扰下变增益放大转发协议进行研究,并考虑不同干扰位置和干扰强度对系统性能的影响。分析了在瑞利衰落信道中,中继受干扰和目的端受干扰两种情况下协同通信系统的性能。推导得到两种受单音干扰的系统模型的中断概率下界及其有限信噪比分集复用折中(DMT)的数学表达式。结果表明,中继受到干扰时系统性能要好于目的端受到干扰,而且目的端对干扰强度的变化更敏感。蒙特卡洛仿真验证了理论分析结果,并表明有限信噪比的分集复用折中比传统的高信噪比定义下的分集复用折中更具有实际意义。
Research on the amplification and forwarding protocol for down-gain of single-tone interference is carried out, and the influence of different interference positions and interference intensity on system performance is considered. The performance of cooperative communication system is analyzed under Rayleigh fading channel, relay interference and destination interference. The mathematical expressions of the lower bound of the outage probability and the limited signal-to-noise ratio demultiplexing (DMT) for two system models subject to monophonic interference are derived. The results show that the performance of the relay is better than that of the destination when the relay is disturbed, and the destination is more sensitive to the change of the interference. Monte Carlo simulation results verify the theoretical analysis and show that the diversity of the limited SNR is more practical than that of the traditional high SNR.