约束准则下扩展时差直方图脉冲分选配对方法

由于现有的多站时差分选方法存在虚警、漏警率高,超低重频脉冲分选正确率低,且不具备稳健单脉冲分选能力的问题,提出一种约束准则下的扩展时差直方图脉冲分选配对方法。该方法首先引入约束准则对脉冲进行参数匹配,获取有效的时差分布;而后采用扩展和递归运算依次完成各辐射源脉冲的分选与配对。经约束限制后,无关脉冲配对机会降低了,从根本上减少了虚假时差和噪声时差,并有效地抑制了虚假目标的产生。仿真结果表明,与现有算法相比,该算法能在不同时差测量误差条件下提高对各类型脉冲的分选正确率,同时降低虚警率和漏警率,实现了对脉冲数极少的超低重频脉冲和单脉冲的准确分选与配对。

Pulse sorting and pairing based on the constrained extended TDOA histogram

In multi-station electronic reconnaissance systems, pulse sorting and pairing are the premise of accurate emitter localization. Considering the problem of a high false alarm rate and a high missing alarm rate for sorting the pulse with an ultra-low pulse repetition frequency in conventional time difference of arrival (TDOA)-based sorting methods, this paper proposes a pulse sorting and pairing method based on the constrained extended TDOA histogram. In this method, a constraint condition with respect to pulse parameters is first introduced to obtain the valid TDOA distribution. Then, the extended iteration operation is used to complete the pulse sorting and pairing of each emitter. After reducing the chance of irrelevant pulse pairing by the constraint condition, the proposed method fundamentally decreases the number of false TDOA and noise TDOA, and effectively suppresses the generation of false emitters. Numerical experiments indicate that compared with the existing methods, the proposed method can significantly improve the performance of TDOA sorting and can achieve the accurate sorting and pairing for extremely few pulses with an ultra-low pulse repetition frequency, even for single pulses.