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本文阐述了幅度调制和频率调制的两种跟踪调制盘的特性,并作定量的比较。同时,讨论了目标和调制盘的空间频谱。对于调幅和调频两种系统,在大讯号和小讯号两种情形下的信噪比的表示式进行了推导,给出了确定目标方位误差与信噪比的关系式。对两种系统的分析结果作了比较。分析的结果可应用于采用TbSe光电管的系统中。
This article describes the amplitude modulation and frequency modulation of the two tracking modulation disk characteristics, and for quantitative comparison. At the same time, the spatial spectrum of targets and modulation disks is discussed. For amplitude modulation and frequency modulation systems, the signal-to-noise ratio is derived in the case of large signal and small signal, and the relationship between the target position error and the signal-to-noise ratio is given. The results of the analysis of the two systems are compared. The results of the analysis can be applied to systems using TbSe photocells.