New design method of space-frequency coding and fast detection algorithm

WANG Xin; WEI Ji-bo; LI Ying

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New design method of space-frequency coding and fast detection algorithm

更新时间：2024-10-14

- New design method of space-frequency coding and fast detection algorithm
- Vol. 30, Issue 4, Pages: 100-105(2009)
- 作者机构：
  
  国防科技大学电子科学与工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN919.3
- Published：2009
- 稿件说明：
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WANG Xin, WEI Ji-bo, LI Ying. New design method of space-frequency coding and fast detection algorithm[J]. 2009, 30(4): 100-105.
DOI：

WANG Xin, WEI Ji-bo, LI Ying. New design method of space-frequency coding and fast detection algorithm[J]. 2009, 30(4): 100-105. DOI：

摘要

对于一个系统化设计的空频码而言

成对错误概率的分析是导出相应编码准则的关键。常用的Chernoff域方法只能提供一个比较松的上界

并不能有效体现空频码设计的一些特点。提出了一种空频码设计的新思路

通过将多径信道下的空频码传输转化为平衰落信道下的空时码传输

从而利用空时码设计中的性能分析有效地导出了空频码设计的相应准则

在获取宽带系统频率分集的基础上优化了编码增益

提出了码设计的一些特点。该分析方法比现有的方法更加具有一般性

也更直观。还提出了一种空频码字的快速检测算法

它利用格形译码的方法大大简化了检测过程

比最大似然检测具有更小的复杂度

有利于系统的实现。

Abstract

To analyze the performance of space-frequency codes

the Chernoff bound was used in the existing literatures

but it was too loose to conclude the diversity order and coding gain simultaneously.Therefore

a new view of the transmission of space-frequency codes was addressed

which transformed the transmission in frequency selective channels into flat fading channels.Based on this transformation

the performance analysis of space-time coding in flat fading channels was used to present an asymptotic analysis for the performance of space-frequency coding.Then

the design criterion of the full diver-sity-achieving space-frequency code was concluded and the coding gain was also optimized.The analysis was more univer-sal and owned an intelligible comprehension.It integrated the existing analysis of the space-frequency codes.A fast detection algorithm for the code was also proposed.It exploited the trellis decoding method and had a reduced complexity compared with the ML detection.The simulation results confirm the validity of the design criterion.

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Related Institution

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