在实战环境下的机载预警雷达信号检测中, 目标信号要与旁瓣杂波、噪声以及干扰信号相抗衡, 决定机载预警雷达作用距离的因素是目标信号功率与旁瓣杂波功率、噪声功率和干扰功率之和的比值, 其中, 不同地形和不同PRF工作模式下机载预警雷达旁瓣杂波功率的计算是个难点。在分析地海杂波特性的基础上, 在考虑雷达信号处理得益的情况下推导出机载预警雷达旁瓣杂波功率计算的通用公式, 并最终给出在杂波和干扰背景下机载预警雷达的作用距离方程。仿真实验结果表明了所推导的旁瓣杂波功率计算公式和作用距离方程的正确性。

In signal detection of Airborne Early Warning (AEW) radar under actual combat environment, the object signal must contend against sidelobe clutter, noise and jamming.The ratio of signal to the sum of sidelobe clutter, noise and jamming determines the operating range of the AEW radar, in which the sidelobe clutter power calculation is most difficult under different terrain and different PRF working model.Considering the benefit of the radar signal processing, we derived the universal formula of sidelobe clutter power calculation based on the analysis of ground and sea clutter characteristics.The operating range equation of AEW radar under the clutter and jamming environment was also given.The simulation results demonstrate the correctness of the sidelobe clutter power calculation formula and the operating range equation.