分析了宽带信号角跟踪的特殊问题及其实现方案.基于互相关函数的角误差检测方法,推导出了在非相关噪声及相关噪声背景下差路信号的输出信噪比及其角度随机误差的数学表达式,进而给出了带宽增益和最佳带宽的概念,以及提高输出信噪比的方法.为了在低载噪比(C/N)时获得角捕获所需要的和路信号以及差路的归一化信号,提出了四通道单脉冲方案.最后归纳出了低C/N时宽带信号角捕获和角跟踪的几种方法并提出了建议.%The special problem of wideband signal angular tracking and implementation are analyzed. Using angular error detection method based on cross correlation function, the output signal to noise ratio (SNR) mathematical expression of signals from the difference channel and its random angular errors are derived in non-correlation and correlation noise backgrounds. Furthermore, the concepts of bandwidth gain and optimum bandwidth are proposed and the method to improve output SNR is given. To obtain normalized signals from the difference and sum channels required by angle acquisition at low C/N, a four-channel monopulse solution is proposed. Methods for angle acquisition and angular tracking of wideband signals at low C/N are summarized and suggestions are given.
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