Ionospheric frequencymodulation causes spreading of the surface clutter in Doppler domain which greatly limits the detection performance of HF sky-wave radars.
电离层频率调制导致地表面杂波的多谱勒展宽，极大地限制了高频天波雷达的目标探测性能。
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On the basis of the principle of range-Doppler coupling of linear frequencymodulation signal, a new method of radial velocity estimation for high coupling coefficient is presented.