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基于运动叠加原理，推导了以Ｄｏｐｐｌｅｒ频率表征的雷达平台运动条件下高频段海浪杂波的运动方程及由平台运动引起的Ｂｒａｇｇ海浪谱的展宽表达式；给出了受平台运动调制的Ｂｒａｇｇ海浪回波与目标信号在Ｄｏｐｐｌｅｒ域里的二阶模糊关系和运用ＳＴ－ＷＤ（ＳｈｏｒｔＴｉｍｅＡｖｅｒａｇｅＷｉｇｎｅｒ－ＶｉｌｅＤｉｓｔｒｉｂｕｔｉｏｎ：短时平均Ｗｉｇｎｅｒ－Ｗｉｌｅ分布）技术对一阶海浪回波信号的高频相位进行平滑处理的方法。在此基础上，提出了一种在展宽的一阶海浪谱中提取目标信号的方法—复解调技术。文章最后给出了运用复解调技术解决高频地波舰载ＯＴＨ（超视距）雷达信号检测问题的仿真结果
Based on the principle of motion superposition, the equations of motion of high-frequency wave clutter and the broadening expression of Bragg wave spectrum caused by the platform motion are deduced based on the Doppler frequency. The Bragg wave response modulated by the platform motion is given The second order fuzzy relationship between wave and target signal in Doppler domain and the method of smoothing the high frequency phase of the first order wave echo signals by using ST-WD (Short TimeAverage Wigner-Wile Distribution) technique. On this basis, a method of extracting the target signal in the broadened first-order sea wave spectrum is proposed - complex demodulation technique. Finally, the article gives the simulation results of complex demodulation technique to solve the problem of HF OTH (over-the-horizon) radar signal detection