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为了提升复杂电磁环境中高频段同时收发认知抗干扰(SCAJ)通信系统性能,本文研究了本振相位噪声对SCAJ接收机干扰感知性能的影响。基于能量检测的干扰感知方法,分析了不同信道中含相噪的接收机干扰信号噪声比,推导出高频段接收机的干扰检测概率和虚警概率及其BCRB上界。仿真结果表明,本振相噪较之信道衰落更能影响高频段SCAJ接收机的抗干扰性能;相噪与抗干扰通信系统的信号带宽相关,采用相同频道通信时,随着信号带宽增大,接收机本振相噪变低,可提高干扰检测概率;若采用精确的相噪估计与补偿技术,则可逼近SCAJ接收机干扰检测概率理论上界,从而增强高频段SCAJ通信系统的抗干扰能力。
In order to improve the performance of SCAJ communication system in high frequency band in complex electromagnetic environment, this paper studies the influence of LO phase noise on the interference perception performance of SCAJ receiver. Based on the interference detection method of energy detection, the interference signal noise ratio of the receiver with phase noise in different channels is analyzed, and the interference detection probability and the false alarm probability of the receiver in high frequency band and its BCRB upper bound are deduced. The simulation results show that the phase noise of the local oscillator can affect the anti-interference performance of the high-frequency SCAJ receiver better than that of the channel fading. The phase noise is related to the signal bandwidth of the anti-interference communication system. With the same channel communication, as the signal bandwidth increases, If the phase noise of the receiver is low, the probability of interference detection can be improved. If accurate phase noise estimation and compensation techniques are used, the upper bound of the probability of interference detection probability of SCAJ receivers can be approximated to enhance the anti-interference ability of SCAJ communication systems in high frequency range .