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.