基于循环频率检验的脉内调制方式识别算法

INTRAPULSE MODULATION RECOGNITION BASED ON CYCLIC FREQUENCY DETECTION

雷达信号的脉内调制方式识别是电子情报分析ELINT(Electronic Intelligence)中重要内容之一。针对常用的脉内调制信号,根据其不同滞后积条件下的循环频率特性差异,通过调制信号在特定条件下是否存在单一循环频率,实现调制识别。计算机仿真结果表明,该方法无需接收信号的任何先验知识,可在较低信噪比条件下实现对常用脉内调制信号的有效识别。

Intrapulse modulation recognition of radar signal is an important task in ELINT（electronic intelligence）.In this paper,aiming at common intrapulse modulation signals,and according to the difference of cyclic frequency properties in various lag product circumstances,the modulation recognition is achieved by detecting whether the modulation signals has single cyclic frequency in specific condition.Computer simulation results show that the proposed method is effective to recognise the common intrapulse modulation signals at a lower signal to noise ratio without any a priori knowledge of received signal.