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利用调频广播信号的浮空平台外辐射源雷达是一种新体制雷达,面临着同频电台干扰难题,提出了干扰状态下基于盲源分离的直达波恢复方法。利用同频电台方位已知等先验信息,提出了一种基于波束域相关函数差异的判断方法,解决了独立成分分析盲源分离算法的输出信号顺序模糊难题,从而可以保证可靠的参考电台直达波恢复,摒弃干扰电台。计算机仿真表明,所给出算法可以准确有效地确定参考电台信号。
The floating platform external radiation source radar using FM radio signals is a new type of system radar, which faces the problem of interference from the same frequency stations. A direct wave recovery method based on blind source separation is proposed. Based on known prior information such as co-frequency station orientation, a new method based on beamforming correlation function difference is proposed, which solves the problem of output signal sequence blindness of independent component analysis blind source separation algorithm so as to ensure reliable reference station direct Wave recovery, to abandon the interference radio. Computer simulation shows that the proposed algorithm can accurately and effectively determine the reference station signal.