低重频PD雷达对低空飞行器的发现概率计算

提出了低脉冲重复频率(LPRF)PD雷达探测飞行器目标的发现概率计算方法。采用临界仰角法处理雷达的未知参数。将旁瓣杂波合理等效为白噪声,处理目标频移落在旁瓣杂波区的情况。采用等效杂波散射截面积叠加旁瓣杂波中目标临界散射截面处理目标频移落在主瓣杂波区的情况,并考虑偏置相位中心天线(DPCA)技术对临界散射截面的影响。最后以E-2C预警机为例,计算某目标在低空突防时发现概率。结果表明,预警机探测低空突防飞行器目标时,目标减小RCS,或选择海情等级较高时突防成功率较高,而目标高度变化对发现概率影响较小。

Detection probability calculation of low pulse repetition frequency PD radar on low altitude aircraft

The detection probability calculating method about low pulse repetition frequency(LPRF) PD radar against air vehicle is studied.The critical elevation method is adopted to deal with the unknown radar parameters.To solve the problem of the target's signal located in sidelobe clutters area,the sidelobe clutters of LPRF PD radar is treated as noise.Add the equivalent clutters RCS into the critical RCS of sidelobe to solve the problem of the target's signal located in main beam clutters area.The DPCA(displaced phased center antenna) technology's effect on critical radar cross section(RCS) is considered.And an example of E-2C early warning airplane detecting an aircraft in low altitude penetration is given.The result shows that it will be more effective for airplane's low altitude penetration against E-2C by reducing target's RCS and penetrating at high sea case,but detection probability changes little with the altitude changing of the target.