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。

Aiming to improve the detection performance of single-frequency radar pulse at small signal-to-noise ratio and low complexity, nonlinear detection of radar pulse signal on fourth order statistics is proposed. Due to the non-friendlyness of the weak radar pulse signal, time deviation is existed when employing the nonlinear detection based on fourth-order statistics. Therefore novel dual-branch detection is proposed. On the basis of a single detection branch, a delay detection branch is added to implement combined detection to solve time location problem. The simulation shows that the receiver performance is better than traditional detection algorithm.

TN957.51

国家自然科学基金资助项目(61571282)