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基于数字调幅广播(DRM)的特点,提出了一种利用直达波频率导频信号的高频外辐射源接收阵列幅相一致性校正新方法。首先介绍了DRM广播的信号结构,分析了其导频信号作为校正源的可行性;考虑到高频段电磁环境和传播环境的时变非平稳特性,提出了一种基于平移不变阵元偶在时间上优选直达波校正数据的方法;最后结合地波模式和天波传播模式高频外辐射源雷达实测多通道数据,比较了该方法与其他辅助定标源方法用于接收阵列校正的效果,分析结果证实了该方法的有效性。
Based on the characteristics of Digital Amplitude Modulation Broadcasting (DRM), a new method to correct amplitude and phase consistency of receive array using high-frequency external radiation source using direct-wave frequency pilot signals is proposed. Firstly, the signal structure of DRM broadcasting is introduced and the feasibility of pilot signal as a correction source is analyzed. Considering the time-varying non-stationary characteristics of electromagnetic environment and propagation environment in high frequency, Time direct wave correction data method; Finally, combined with the ground wave mode and sky wave propagation mode of high-frequency external radiation source radar measured multi-channel data, compared with this method and other auxiliary calibration source method for receiving array correction effect analysis The results confirm the validity of this method.