一种用于超宽带通信的改进型混沌脉冲位置调制方法  

A Modified Chaotic Pulse Position Modulation Scheme for Ultra-Wide Bandwidth Communication

作　　者：杨华[1] 蒋国平[1] 

机构地区：[1]南京邮电大学自动化学院,江苏南京210003

出　　处：《南京邮电大学学报（自然科学版）》2006年第2期47-50,共4页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金重点项目(60432040);江苏省高校"青蓝工程"计划项目(JS200407);江苏省高校自然科学基金重点项目(04KJA517092)资助项目

摘　　要：针对混沌脉冲位置调制(CPPM,Chaotic Pu lse Position Modu lation)存在的缺点提出一种新的可用于超宽带冲激无线电(UWB-IR,U ltra-W ide-Band based Impu lse Rad io)的改进型通信方案。改进后的混沌脉冲位置调制方法能够克服CPPM容易出现的发散和严重的误差传播,具有保密性好、可靠性高、设备的实现更加简单等优点。通过仿真对在有噪声和滤波的情况下改进前后系统的误码性能进行了比较。结果表明,在非理想定时情况下,文中提出的新系统具有比CPPM更好的解码性能。A modified chaotic pulse position modulation （CPPM） strategy for ultra-wide bandwidth impulse radio communication system is firstly proposed here, aiming at overcoming the two main disadvantages in CPPM. The modified method eliminates the possible occurrence of boast and serious error propagation in CPPM. It posses good security, high reliability and easy realization. The performances of the systems before/after modification are simulated and analyzed in the presence of noise and filtering. The simulation results show that the proposed scheme in this paper performs better in demodulation under the situation of imperfect timing.

关 键 词：混沌脉冲位置调制 扩频 超宽带 

分 类 号：TN914.2[电子电信—通信与信息系统] TN929.5[电子电信—信息与通信工程]