基于混沌码的跳时超宽带信号功率谱分析

On the power spectral density of Ultra Wide Band based on chaotic code

为了减小超宽带通信对其它通信系统造成干扰,将混沌码引入脉冲位置调制跳时超宽带(Pulse Position Modulationg Ti me Hopping Ultra Wide Band,PPM-TH-UWB)系统,采用Matlab仿真工具分析了基于分段Logis-tic混沌映射跳时码的超宽带信号功率谱密度,结果表明混沌跳时码可以有效平滑功率谱,当增长码周期、增大码序列最大值时可有效减小谱线波动和离散谱数量。

In order to reduce the interference between ultra-wideband communication systems and the others,Pulse Position Modulationg Time Hopping Ultra Wide Band（PPM-TH-UWB） communication systems based on chaotic code are proposed,and the charts for the power spectral density of PPM-TH-UWB based on piecewise Logistic chaotic code are established with the help of software Matlab.Simulation results show that,the chaotic code can smooth the power spectral density,enlarge the loop cycle of chaotic code,increase the maximum element of the code,and spread the power more evenly.