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为改善低信噪比条件下低复杂度的单频雷达脉冲信号的检测性能,提出了非线性四阶检测方法。基于微弱雷达脉冲信号的非友好性会导致非线性四阶检测中存在时间偏差问题,文中提出在单支路非线性检测的基础上增加延时检测支路,实现双支路联合检测,解决非线性四阶检测中的时间定位问题。结果表明:在恒虚警的情况下,该方法表现出优于传统检测接收机的性能。
In order to improve the detection performance of low-complexity single-frequency radar pulse signals with low SNR, a nonlinear fourth-order detection method is proposed. The non-friendliness based on weak radar pulse signals will lead to the problem of time deviation in the fourth-order nonlinear detection. In this paper, we propose to increase the delay detection branch based on the single-branch nonlinear detection to achieve joint detection of double branch, and solve the problem of non- Time Positioning in Linear Fourth Order Detection. The results show that in the case of CFAR, this method shows better performance than the traditional receiver.