北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2007, Vol. 30 ›› Issue (1): 40-43.doi: 10.13190/jbupt.200701.40.wangdy

• 论文 • 上一篇    下一篇

多径信道的盲序列检测

王东昱, 张 欣, 杨大成   

  1. 北京邮电大学 无线通信中心,北京100876
  • 收稿日期:2006-01-05 修回日期:1900-01-01 出版日期:2007-03-30 发布日期:2007-03-30
  • 通讯作者: 王东昱

Blind Sequence Estimation Under the Multi-Path Channel

WANG Dong-yu, ZHANG Xin, YANG Da-cheng   

  1. Wireless Communication Center Beijing University of Posts and Telecommunications,Beijing 100876, China
  • Received:2006-01-05 Revised:1900-01-01 Online:2007-03-30 Published:2007-03-30
  • Contact: WANG Dong-yu

摘要:

为了提高接收机在检测发送序列的性能,对多径信道的盲序列检测进行了改进,建立了节点总度量的递推方程,同时定义了分枝转移度量的更新量. 改进后的算法可以同时完成信道信息的估计和发送序列的检测.其中信道信息由自适应滤波器实时估计.仿真结果表明, 新的度量递推算法在比特误码性能上接近全序列比较欧氏距离的最佳算法,但计算速度提高了.

关键词: 盲序列检测, 累积度量, 分枝转移度量, 改进型VA

Abstract:

To improve the performance of detecting the transmitted sequence, the Viterbi algorithm (VA ) used in the multi-path channels was modified. The recursive metric equation was built and the renewed branch transition metric was given. The modified VA can estimate the channel information and detect the transmitted sequence simultaneously. Meanwhile, the channel information can be estimated by adaptive filter. The simulation results showed that the modified VA is near to the optimal algorithm, however, the its computational speed was faster than the optimal algorithm.

Key words: blind sequence estimation, cumulative metric, branch transition metric, modified Viterbi algorithm

中图分类号: