基于SystemView的混沌扩频测距系统滑动相关同步捕获仿真

摘要

混沌序列以其相关性好、对初值敏感、保密性强等特性成为直接扩频通信系统中理想的扩频码.介绍了伪码测距的基本原理和滑动相关伪码捕获原理,并构建了滑动相关同步捕获仿真模型.借助SystemView仿真软件,对其进行了模型搭建和仿真.通过理论与仿真分析结果表明,利用混沌码作为扩频码实现测距是可行的,且具有高保密性、低截获和适合多目标测距等优点.%Chaotic sequence, with its good correlation performance, being sensitive to initial condition and hard to be decrypted, has been used as an ideal spread spectrum code in direct spread spectrum communica tion system- The basically principle of the pseudo code ranging and the principle of pseudo code acquistion were introduced. The simulation model of glide correlation synchronous code acquisition is constructed. By means of System-View software, the model was builded and simulated. The results show that taking the chaotic code as the spread spectrum code of ranging is feasible, with the strong point of high security, low interception, and it is also suitable for multi-target ranging, etc.