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现代雷达检测的目标环境是极其复杂的,从而向“雷达信号处理”提出了极为艰巨的任务。“信号处理”一方面必须尽可能提高信/干比,另一方面又要获得良好的恒虚警性能。获得良好的恒虚警性能,其所以必要,这是因为现代的(雷达)目标环境中的干扰,除了机内的白噪声外,还有诸如地物,雨雪和海浪等一类干扰,以及敌人施放的有源和无源干扰,这些干扰强度起伏可达60db以上,若采用(数字的或模拟的)自动信号处理设备,对于动态范围如此之大的雷达回波来说,往往引起过载,就是人工PPI显示也会出现一片白的问题。
The target environment for modern radar detection is extremely complex, posing a daunting task to “radar signal processing.” On the one hand, “signal processing” must raise the letter / dry ratio as much as possible, and on the other hand, it must also obtain good CFAR performance. Good CFAR performance is necessary because of the interference in the modern (radar) target environment, in addition to white noise in the aircraft, interferences such as ground objects, rain and snow and waves, and Active and passive interference from the enemy, which can fluctuate above 60db, can be overloaded with radar signals that have a large dynamic range if using (digital or analogue) automatic signal processing equipment. PPI manual shows that there will be a white problem.