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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 problems of wideband signal angular tracking and its implementation are analyzed. Based on the method of angular error detection based on cross-correlation function, the mathematical expressions of output signal-to-noise ratio and angle random error of the difference signal are deduced in the context of uncorrelated noise and correlated noise. Then the bandwidth gain and optimal bandwidth The concept, as well as to improve the output signal to noise ratio method. In order to obtain the sum signal and the normalized signal of the difference required for angular acquisition at low carrier-to-noise ratio (C / N), a four-channel single-pulse scheme is proposed. At last, several methods of angle acquisition and angular tracking of wideband signal with low C / N are summarized and some suggestions are put forward.