一种基于自相关的激光脉冲编码信号解码方法

激光脉冲编码是半主动激光制导武器采用的一种抗干扰措施,为满足半主动激光制导武器光电对抗的需要,以激光信号的脉冲到达时间(TOA)为参数,依据激光脉冲编码信号的时间相关性,提出了一种通过首先对由脉冲到达时间组成的脉冲到达时间序列作自相关处理,计算出信号的重复周期,然后再在一个信号周期内,通过确定脉冲重复间隔的时间值、个数和位序来鉴别信号码型,从而实现信号解码的方法。阐述了该解码方法的原理及实现。原理实验和数字仿真实验证明,对于当前半主动激光制导武器采用的大多数激光脉冲编码信号,采用该解码方法,一般在4个信号周期时间内就能实现解码。

A method of decoding laser pulse-coded signal based on self-correlation

The method of encoding laser pulse is one of the anti-jamming ways and means used by self-active laser homing weapons.In order to meet the requirement of the electro-optics countermeasure for laser homing weapons,a new method of decoding laser pulse-encoded signal was proposed,depending on the relativity of time of those pulse-encoded signals themselves.The signal decoding can be actualized by that confirming the value of the pulse repetition interval(PRI)of the signal and the number of the pulse repetition interval of the signal and the scheduling of the pulse repetition interval of the signal in one signal period.The signal period can be worked out by doing self-correlation disposal for pulse-encoded signal and depending on the characters of self-correlation function.The time of pulse arriving(TOA)of laser signal is used as the only parameter of decoding signal.The principle and the realization of this decoding method were expatiated on in this paper.Having been proved by the principle experiment and the numeral simulation experiment,taking this method to decode these signals which are the bulk of laser pulse-encoded signals used by the self-active laser homing weapons currently,the time used during the course of signal decoding is usually about 4 signal periods.