FFT比相测距雷达中的相差—距离关系研究

RELATIONSHIP BETWEEN PHASE DIFFERENCE AND RANGE IN FFT PHASE-COMPARING RANGING RADARS

连续波比相测距雷达具有结构简单、测距精度高、便于采用现代数字信号处理技术等优点。但其相差 -距离精确关系尚未见有正式文献予以报导。本文深入探讨了在采用 FFT法求相的情况下 ,连续波双频比相测距雷达中的相差 -距离的精确关系 ,从而为此种雷达的深入研究提供了一个重要的理论基础。

CW phase-comparing radars are simple, accurate and easily adaptable to the adoption of digital signal processing technology. But precise relationships between the phase difference and range has not been seen reported on literatures. The paper studies such relations when FFT method is applied to obtain the phase of signals.