多用户混沌序列扩频通信系统设计与性能分析
doi: 10.3724/SP.J.1146.2006.00265
Design and Performance Analyses of Multi-user Chaotic Sequence Spread-Spectrum Communication System
-
摘要: 该文介绍了多用户混沌扩频通信系统原理，分析了Chebyshev，Logistic，Tent 3种混沌扩频序列的平衡性、相关性，建立了多用户混沌扩频通信系统动态可视化仿真模型，利用模型研究了这3种不同混沌扩频序列扩频码的初始值、信噪比、用户数以及截取的序列长度对系统误码率的影响。仿真结果表明，Chebyshev映射的扩频性能最好，Logistic映射次之，Tent映射最差，且这3种混沌扩频码的扩频性能均优于传统的扩频码。
-
关键词:
- 混沌序列;直接序列扩频;平衡性;相关性
Abstract: The principle of multi-user chaotic sequence spread-spectrum communication system is introduced. Performances of balance and correlation properties of three different chaotic spread series (Chebyshev, Logistic and Tent) are analyzed. The dynamic visual simulation modeling of multi-user chaotic sequence spread-spectrum communication system is established. Based on this modeling, the error-bit rate performances of these systems with different initial values, signal to noise ratio, number of users and the length of sequence are investigated. Simulation results show that the spread-spectrum performance of Chebyshev is the best, then Logistic and Tent, and the spread-spectrum performances of the three chaotic spread series are better than that of the conventional spread sequence. -
Ling Cong, Wu Xiaofu, and Sun Songgeng. A general efficient method for chaotic signal estimation [J].IEEE Trans. on Signal Processing.1999, 47 (5):1424-1428[2]Kohda T and Tsuneda A. Pseudonoise sequences by chaotic nonlinear maps and their correlation properties[J]. IEICE Trans. on Communications.1993, E76-B(8): 855-862[3]Mcgillem C D. A novel mutiple-address digital communication[4]system using chaotic signals[C]. Proceedings of International[5]Conference on Communications, Chicago, l992, 41(6): 1232-1236[6]Heidari B G and McGillem C D. A chaotic direct-sequence spread-spectrum communication system[J].IEEE Trans on Commun.1994, 42(2/3/4):1524-1527[7]胡健栋, 郑朝辉, 龙必起, 等. 码分多址与个人通信[M]. 北京: 人民邮电出版社, 1996: 151-160[8]于银辉, 刘卫东. 两种混沌扩频序列平衡性分析[J]. 重庆邮电学院学报, 2004, 16(3): 61-64[9]王亥, 胡健栋. 改进型Logistic-Map混沌扩频序列[J]. 通信学报, 1997, 18(8): 71-77 -
计量
- 文章访问数: 3438
- HTML全文浏览量: 105
- PDF下载量: 1197
- 被引次数: 0
下载:
