针对舰载高频地波OTH雷达回波模拟的需要，从发射和接收基带信号相位的角度研究目标回波及海杂波实时模拟的方案。模拟时不但要保证真实性，还要保证实时性，即要保证模拟方案的计算量不能过大。考虑到上述要求，提出了将发射基带信号根据需要适当延时得到接收基带信号，并将目标多普勒信息与其叠加。对该方案分析表明，尤为适用于舰载OTH雷达海杂波的实时模拟，并给出了模拟结果，与实际采集的海杂波对比表明，该方案的模拟效果较好。

According to the need for simulating echoes of shipborne HF ground wave OTH (over the horizon) radar, this paper studies a method for real time simulating target echo and sea clutter of HF radar by studying transmitted and received baseband signal phase. Not only the realness of simulation but also the real time ness of simulation should be ensured, and the computational load can not be too huge. According to these requirements a method is suggested in which the receiving baseband signal will be obtained by delaying the transmitting baseband signal and adding the Doppler shift. Analysis shows that the method is more suitable for real time simulating sea clutter of shipborne OTH radar, and the simulation result is given. This simulation method is shown to be very good comparing with real sea clutter.

TN959.72 TN957.51