上海交通大学学报(自然版) ›› 2011, Vol. 45 ›› Issue (03): 358-0362.

• 无线电电子学、电信技术 • 上一篇    下一篇

采用窄带干扰抑制技术的直接序列超宽带系统闭式误比特率分析

龚凌嵩, 王澄, 杨宇航, 朱容波   

  1. (1.上海交通大学 电子信息与电气工程学院, 上海  200240; 2. 中南民族大学 计算机科学学院, 武汉 430074)
  • 出版日期:2011-03-30 发布日期:2011-03-30

ClosedForm BER Analysis of DSUWB Systems Using Narrowband Interference Suppression Technology

 GONG  Ling-Song, WANG  Cheng, YANG  Yu-Hang, ZHU  Rong-Bo   

  1. (1. School of Electronic, Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai, 200240, China;
    2. College of Computer Science, SouthCentral Univ. for Nationalities, 430074 Wuhan, China)
  • Online:2011-03-30 Published:2011-03-30

摘要: 为了准确评价直接序列超宽带(DSUWB)系统在窄带干扰抑制下的误比特率,提出了一种基于特征函数的方法,精确计算使用双边抽头横向滤波器抑制单音干扰后的系统误比特率,从数学上给出了双边抽头横向滤波器干扰抑制因子的表达式,并证明了滤波器抽头数足够多,单音干扰可以几乎完全被抑制.仿真及数值结果表明,该闭式误比特率性能分析方法具有准确性和有效性.

关键词: 超宽带, 直接序列, 干扰抑制, 误比特率, 特征函数

Abstract: In order to accurately evaluate the bit error rate(BER) of DSUWB systems with narrowband interference suppressor, a method based on characteristic function (CF) is proposed for precisely calculating the BER of DSUWB systems using twosided transversal filters for rejection of single tone interference. We derive a mathematical expression called interference suppression factor of twosided transversal filters. In addition, theory analyses show that with sufficiently large tap number, the tone interference could be almost cancelled totally. The simulation and numerical results validate the accuracy and effectiveness of analytical BER derivations.

Key words: Ultrawideband (UWB), direct sequence (DS), interference cancellation, bit error rate (BER), characteristic function (CF)

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