Research on laser decoy anti-interference technology based on pseudo-random encryption

Abstract

Laser decoy is one of the commonly used technologies to counter the threat of laser guidance. In order to address the problem of mutual interference when multiple optoelectronic countermeasures systems engage in autonomous decoy interference, this paper proposes a decoy interference laser encryption technology based on pseudo random sequences, which encrypts the copied interference laser encoded pulse sequence twice, Embed identity information into the original encoded pulse to form a new interference laser encoded pulse sequence. When the interference laser is emitted, the own optoelectronic countermeasure system uses the known encrypted sequence to determine the source of the current received laser, thereby solving the problem of self interference and mutual interference, and improving the countermeasure performance. This article uses pseudo random encryption based identification of friend or foe technology to conduct simulation experiments on encryption and decryption of existing guided laser coding methods. The results show that this technology can effectively improve the accuracy and reliability of the laser warning module, and has certain practical value.