北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2005, Vol. 28 ›› Issue (6): 13-16.doi: 10.13190/jbupt.200506.13.baizq

• 论文 • 上一篇    下一篇

一种符号干扰信道中最优传输方式

白自权,李道本   

  1. 北京邮电大学 信息工程学院, 北京 100876
  • 出版日期:2005-12-28 发布日期:2005-12-28

A Transmission in ISI Channel

BAI Ziquan,LI Daoben   

  1. School of Information Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Online:2005-12-28 Published:2005-12-28

摘要:

为提高符号干扰信道中传输的可靠性,研究了强行提高符号速率的低维调制传输方式,并与相同传信率和相同系统带宽条件下的高维调制传输方式进行了误码性能的比较. 强行提高符号速率的低维调制传输方式充分利用了系统的潜在抗干扰性,结合序列检测方式可以大幅度降低系统的门限信噪比达10?dB以上. 仿真结果表明,在符号干扰信道采用强行提高符号速率的低维调制传输方式和序列检测要明显优于采用高维调制的传输方式和逐符号检测.

关键词: 符号干扰, 低维调制, 高维调制, 序列检测

Abstract:

In order to improve the transmission performance in intersymbol interference (ISI) channel, high rate lower order modulation transmission with ISI was studied and the error rate performance of lower order modulation and higher order modulation with the same message rate and band width was compared. High rate lower order modulation transmission with ISI makes full use of the potential anti jam capability of the system and the threshold signal to noise ratio is greatly decreased by more than 10?dB. Simulation results show that with the same message rate and band width, lower order modulation transmission, interfered by ISI and employing sequence detection, obtains greater performance gain than higher order modulation, which is not influenced by ISI and detected symbol by symbol.

Key words: intersymbol interference, lower order modulation, higher order modulation, sequence detection

中图分类号: