激光束编码的敌我目标识别及其密码器设计

Design of Laser Beam Coded IFF and Its Coder

为在现代电子战争中可靠地识别敌我，提出了一种基于激光束编码的合作式目标识别方法．该方法通过半导体激光器发射含有询问、应答密码信号的调制光束进行通信，完成敌我目标的主动式识别，从而解决了传统无线电识别系统抗干扰性差、精度低等问题．设计了一种以Ｍ序列为询问、应答码的密码器．解决了传统目标识别系统中密码容量不足，随机性、保密性差和抗干扰能力低等问题．给出了产生全部Ｍ序列的过程及其电路设计．试验结果证明了该方法的实用性和可靠性．

To identify friend or foe reliably in modern electronic battlefield, a cooperative target recognition technique based on laser beam coding is presented in this paper. Identification systems based on this technique communicate with each other by sending questioning and answering codes modulated on semiconductor lasers. A new type of coder for the system is designed using M sequence as question and answer ciphers. As a result, problems such as insufficiency of codes, bad random of cipher accessing, poor security and anti jamming ability which exist in the former radio based IFF equipments can be solved. Circuit design for generating all M sequences is given. The experimental results show the practicability and reliability of the technique.