北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (6): 62-66.doi: 10.13190/jbupt.200906.62.chenzh

• 论文 • 上一篇    下一篇

无循环前缀SFBC-OFDM系统的Turbo均衡

陈哲;杨大成;常永宇   

  1. (北京邮电大学 信息与通信工程学院, 北京 100876)
  • 收稿日期:2009-03-26 修回日期:2009-09-10 出版日期:2009-12-28 发布日期:2009-12-28
  • 通讯作者: 陈哲

A Turbo Equalization Algorithm for SFBC-OFDM Systems without CP

CHEN Zhe;CHANG Yong-yu;YANG Da-cheng   

  1. (School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)
  • Received:2009-03-26 Revised:2009-09-10 Online:2009-12-28 Published:2009-12-28
  • Contact: CHEN Zhe

摘要:

为了提高传输效率,对无循环前缀(CP)的空频分组码正交频分复用(SFBC-OFDM)系统进行了研究,提出一种基于软信息反馈的Turbo均衡算法. 同时提出了符号间干扰删除、软循环重构、对角化SFBC译码以及MMSE频域均衡器,通过多次迭代抑制系统中出现的各种干扰. 仿真结果表明,该算法可有效改善无CP的SFBC-OFDM的误码性能.

关键词: 正交频分复用, Turbo均衡, 空频分组码

Abstract:

To increase transmission efficiency, a soft-information-based Turbo equalization algorithm is proposed for the space-frequency block code orthogonal frequency-division multiplexing (SFBC-OFDM) system without cyclic prefix (CP). In our algorithm, processing modules as inter-symbol interference cancellation, soft cyclic reconstruction, diagonalized SFBC decoder and minimum mean square error frequency domain equalizer are proposed to work in an iterative way to suppress interferences. Simulation results show that this algorithm can improve the bit error rate performance of SFBC-OFDM system without CP.

Key words: orthogonal frequency-division multiplexing, Turbo equalization, space-frequency block code