基于短时PRI变换的多目标分选和识别算法

A Novel Algorithm for Multi-signal Deinterleaving and Recognition Based on Short-time PRI Transform

摘要:

针对经典脉冲重复间隔(PRI)变换类算法和平面变换类算法无法自主获取复杂信号的实时重频变化特性的问题,在修正PRI变换算法基础上提出短时PRI变换方法。该方法结合对目标脉冲序列短时加窗和PRI变换的方法,获取了目标信号连续的重频变化信息。仿真结果表明:这种算法不仅能够高精度地估计目标PRI中心值,还能获取PRI的特征信息和调制方式,实现实时有效的多目标分选和截获。

Abstract:

The classical pulse repetition interval ( PRI) transform algorithm and thetraditional plane transform technology can not acquire and describe the PRI modulationcharacteristics of complex signals automatically. To solve the problem, a novel short-timePRI transform algorithm is suggested based on the improved PRI transform algorithm. ltcombines the two methods of short-time windowing and PRI transform algorithm, to get themodulation information and changing characteristics of the target signal's PRl. Thsimulation results show that the proposed algorithm is successful in deinterleaving andrecognizing multi-targetas well as accurately estimating the PRI center value. Moreover, thealgorithm can obtain more PRI changing characteristics, In this sense, the proposed methodis a real time and effective method for multi-signal deinterleaving and interception,