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介绍了测速雷达中的谱分析技术，分析了其测速精度和速度分辨率，讨论了ＦＦＴ运算对杂波和噪声的抑制作用。
The spectrum analysis technique in speed radar is introduced. The precision and resolution of velocity measurement are analyzed. The suppression of clutter and noise by FFT calculation is discussed.