基于延时线模型的UWB混沌调频信号测距技术的研究  

FM chaos UWB signal ranging technology based on delay line model

作　　者：龚帅[1] 孔龙[1] 徐哲鑫[1] 

机构地区：[1]厦门大学通信工程系,福建厦门361005

出　　处：《重庆邮电大学学报（自然科学版）》2011年第6期722-727,共6页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：重庆市科技攻关计划项目(CSTC;2010AC3060)~~

摘　　要：提出一种新型的基于延时线模型的超宽带混沌调频信号测距技术,从理论上推导了该信号的测距克拉美-罗界,结果表明测距精度与信噪比(SNR)、调频指数以及载波中心频率成正比。仿真并分析了该技术在测距系统中和多用户干扰存在时的测距均方根误差性能,结果表明,该技术相比于一般的高斯脉冲雷达检测技术在对抗多用户干扰时有着明显的性能优势。A new ranging technology based on delay lines model for frequency-modulated chaos ultra-wideband pulse（ FMC- UWB） is proposed in this paper. The ranging Cramer-Rao bound（CRB） of this system is derived theoretically. The bound shows that the ranging accuracy is related to Signal-to-Noise Ratio（ SNR）, frequency modulation index and the center frequency of the carrier signal. The root mean square error（ RMSE） performance and multi-user interference of this system is simulated and analyzed. Results show that the performance of this proposed system is more efficient than that of the traditional UWB radar detection system based on Gaussian pulse since the former possesses better capacity of anti-muhi-user interference （MUI）.

关 键 词：超宽带混沌调制信号 克拉美-罗界 延迟线测距 多用户干扰 

分 类 号：TN98[电子电信—信息与通信工程]