通常雷达跟踪器都采用快或“瞬时”的自动增益控制(AGC)回路来控制中放增益。本文指出,当跟踪精度受目标“闪烁”效应限制时,使用这种方法会引入不必要的重大误差。本分析中,用圆锥扫描雷达来跟踪目标,把目标看作是由两个点反射器组成的。研究了AGC响应时间的两种极限情况:“快”AGC(响应比接收信号的起伏快得多)和“慢”AGC(与此相反)。研究表明,快AGC倾向于跟踪两源中的较大者,而慢AGC跟踪雷达的“重心”或“质心”。本文也研完了角跟踪误差的影响,例如在跟踪一个快速越过的目标时可能会出现角跟踪误差。同时考虑到两种AGC响应的闪烁误差概率分布是不同的。快AGC在大多数时间里引入的误差很小,但它能引入偶然出现的闪烁误差或“尖峰”;慢AGC有时比快AGC的跟踪误差要稍大些,但不会有大幅度的尖峰。分析表明,理论计算得出的闪烁误差概率看来比实际情况低,估计这可能是由于大闪烁尖峰或大目标源移(亮点漂移)使角跟踪回路饱和而恢复时间较长的缘故。在这些情况下,慢AGC比快AGC跟踪精度更高些。 Radar trackers typically use fast or “instantaneous” automatic gain control (AGC) circuits to control the mid-amplification gain. This paper points out that the use of this method introduces unnecessary significant errors when the tracking accuracy is limited by the target “flicker” effect. In this analysis, the target is tracked with a cone scanning radar, which is considered as consisting of two point reflectors. Two extreme cases of AGC response time are studied: “fast” AGC (response much faster than received signal fluctuation) and “slow” AGC (as opposed to this). Research shows that fast AGC tends to track the larger of the two sources, whereas slow AGC tracks the “center of gravity” or “centroid” of the radar. This article also investigates the effects of angular tracking errors, such as angular tracking errors that may occur when tracking a rapidly moving target. Taking into account the two AGC response scintillation error probability distribution is different. A fast AGC introduces a small error for most of the time, but it can introduce occasional flicker errors or “spikes”; a slow AGC sometimes has slightly larger tracking errors than a fast AGC, but with no significant spikes. The analysis shows that the theoretically calculated flicker error probability appears to be lower than in practice, which is estimated to be due to a large flash spike or large target source shift (bright spot drift) that saturates the angular tracking loop for a longer recovery time. In these cases, slow AGC tracking accuracy is faster than fast AGC.