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一、引言卫星或导弹的外测系统中速度或距离变化率是一个重要参数。测量飞行器应答机转发载波的多普勒频率可以求得目标速度。多普勒频率通常测量偏置频率与多普勒频率在采样时间间隔的整周数。在计数器中扣除偏置频率后得到平均的多普勒频率,并区分其顿率的正或负。采用相位增量检测器测量多普勒频率的优点首先是它能分辨多普勒频率
I. INTRODUCTION The rate of change of speed or distance in an external measurement system of a satellite or missile is an important parameter. The target velocity can be obtained by measuring the Doppler frequency of the aircraft’s transponder carrier. The Doppler frequency usually measures the full number of weeks between the offset frequency and the Doppler frequency over the sampling interval. Deducted in the counter offset frequency after the average Doppler frequency, and distinguish between the positive or negative rate. The advantage of using a phase-delta detector to measure Doppler frequency is primarily that it can distinguish Doppler frequencies