[1]黄爽,江彬,高西奇.自适应MIMO系统中的最优线性疏散码设计[J].东南大学学报(自然科学版),2008,38(4):569-573.[doi:10.3969/j.issn.1001-0505.2008.04.005]
 Huang Shuang,Jiang Bin,Gao Xiqi.Design of optimal linear dispersion code in adaptive MIMO system[J].Journal of Southeast University (Natural Science Edition),2008,38(4):569-573.[doi:10.3969/j.issn.1001-0505.2008.04.005]
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自适应MIMO系统中的最优线性疏散码设计()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第4期
页码:
569-573
栏目:
信息与通信工程
出版日期:
2008-07-20

文章信息/Info

Title:
Design of optimal linear dispersion code in adaptive MIMO system
作者:
黄爽 江彬 高西奇
东南大学移动通信国家重点实验室, 南京 210096
Author(s):
Huang Shuang Jiang Bin Gao Xiqi
National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
关键词:
线性疏散码 最小均方误差 自适应MIMO系统 梯度下降法 坐标转换
Keywords:
linear dispersion code minimizing mean square error adaptive multiple-input multiple-output system gradient descent algorithm coordinate transform
分类号:
TN929.5
DOI:
10.3969/j.issn.1001-0505.2008.04.005
摘要:
针对自适应MIMO传输系统中信道可支持的独立数据流个数随信道变化的情况, 设计了一种适用于自适应MIMO传输系统的线性疏散码(LDC). 首先建立了LDC编码矩阵中信息符号数与独立数据流个数的关系, 接着提出一种基于最小均方误差(MMSE)的设计准则, 并采用梯度下降法和球面坐标转换求得MMSE意义下最优的LDC. 仿真结果表明: 当独立数据流个数小于发送天线数时, 该方法较之其他同类方案可获取1~3 dB的性能增益; 当独立数据流个数等于发送天线数时, 该方法和基于最大化互信息量准则设计出的LDC具有相同的性能.
Abstract:
A linear dispersion code(LDC)that can apply to the adaptive multiple-input multiple-output(MIMO)system is designed due to the fact that the number of independent streams will change with different channel conditions. First, a relationship between the number of symbols in LDC coding matrix and the number of independent streams is established. Then, a minimizing mean square error(MMSE)rule is proposed to design the optimized LDC and the optimum problem is handled by the gradient descent algorithm and the coordinate transform. The simulations show that the proposed LDC can efficiently improve the system performance by 1 to 3 dB for rank deficient channel and obtain the same performance with the maximizing mutual information(MMI)based LDC for full rank channel.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 黄爽(1983—),女,硕士生; 高西奇(联系人),男,博士,教授,博士生导师,xqgao@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(60572072,60496311)、国家高技术研究发展计划(863计划)资助项目(2006AA01Z264)、国家重点基础研究发展计划(973计划)资助项目(2007CB310603)、国家教育部博士点基金资助项目(20060286016).
引文格式: 黄爽,江彬,高西奇.自适应MIMO系统中的最优线性疏散码设计[J].东南大学学报:自然科学版,2008,38(4):569-573.
更新日期/Last Update: 2008-07-20