Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (9): 115-119.doi: 10.3969/j.issn.1000-565X.2011.09.020

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Time-Hopping Multiple Access Performance of Ultra-Wideband System Based on Parallel Combinatory Spread Spectrum

Jiang Xiao-fei  Guo Li-li  Qi Lin  Zhao Bing   

  1. College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China
  • Received:2010-12-20 Revised:2011-05-26 Online:2011-09-25 Published:2011-08-02
  • Contact: 姜晓斐(1985-) ，男，博士生，主要从事超宽带通信系统研究． E-mail:xiaofei433@yahoo.com.cn
  • About author:姜晓斐(1985-) ，男，博士生，主要从事超宽带通信系统研究．
  • Supported by:

    国家自然科学基金资助项目( 60772129)

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Abstract:

This paper deals with the previously-proposed ultra-wideband ( UWB) communication system based on the parallel combinatory spread spectrum,and employs a time-hopping method to investigate the multiple access performance of the proposed system by analyzing the BER performance and the number of multi-user access. Simulated results show that the employment of the time-hopping method improves the multiple access performance and greatly increases the system capacity,and that the proposed system with time-hopping multiple access in the existence
of 5 interference users is still superior to the conventional single-user UWB communication system in terms of BER performance. Moreover,the authors further analyze the system capacity and suggest that,when there are more interference users,it should be considerable to adopt a new time-hopping code to reduce the probability of pulse collision,so as to decrease the multi-user interference.

Key words: parallel combinatory spread spectrum, ultra-wideband, multiple access interference, bit error rate, pulse position modulation

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