摘要
通过分析半主动激光制导武器特性对激光脉冲间隔编码方法的编码间隔取值要求,研究线性反馈移位寄存器(LFSR)调制码、LFSR状态码的生成原理以及两种码型脉冲间隔的取值范围与产生方法对系统制导性能与抗干扰性能的影响。仿真结果表明,LFSR调制码不利于精确制导,且易被以最小脉冲间隔为周期的精确频率码干扰;LFSR状态码能够克服LFSR调制码的缺陷,但仍存在所需识别参数少和抗干扰性不强的问题。提出基于矩阵求余的伪随机码,利用矩阵代替线性反馈移位寄存器和模二加法器,结果表明,其抗干扰性能比LFSR状态码更好。
The requirements of precision guidance characteristics of a semi-active laser-guided weapon on the laser-coded pulse interval ΔTi were analyzed herein based on the pulse interval coding method. The generation principles of( the linear-feedback shift register)(LFSR) modulation code and the LFSR status code were studied and simulated. The guidance and anti-interference performances were studied based on the value range and generation method of the pulse interval ΔTi of two codes. This study reports that the LFSR modulation code is not conducive to accurate guidance and is susceptible to accurate frequency code interference with a minimum pulse interval ΔTmin. The LFSR status code overcomes the problem of poor precision guidance characteristics of the LFSR modulation code, and of being susceptible to accurate frequency code interference with the ΔTmin period;however, the problems that the required identification parameters are few and the anti-interference is not strong still remain. This study uses a matrix to complete the register state transition, instead of the LFSR and the function of the modulo-2 adder, based on finding the coding with a high guidance performance and a strong anti-interference performance. A pseudo-random code based on the matrix remainder is proposed and applied. The theoretical analysis shows that the anti-interference performance of the pseudo-random code is better than that of the LFSR status code.
作者
邱雄
刘志国
王仕成
Qiu Xiong;Liu Zhiguo;Wang Shicheng(Rocket Army Engineering University Graduate School of PLA, Xi'an, Shaarixi 710025, China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2019年第8期49-56,共8页
Chinese Journal of Lasers
基金
国家自然科学基金(61673017,61673386)
关键词
激光器
伪随机码
脉冲间隔编码
线性移位寄存器
抗干扰性
lasers
pseudo random code
pulse interval coding
linear shift register
anti-interference
