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一种多数据流MIMO系统中的改进自适应算法
引用本文:李皎亮,蒋铃鸽.一种多数据流MIMO系统中的改进自适应算法[J].计算机仿真,2007,24(11):86-88,109.
作者姓名:李皎亮  蒋铃鸽
作者单位:上海交通大学电子工程系,上海,200240
摘    要:研究表明自适应MIMO技术是无线频谱资源有限情况下提高通信系统吞吐量的一种有效方式.文中对数据流MIMO系统提出一种基于MMSE检测的改进自适应算法,首先利用基于奇异值分解(SVD)的注水算法进行初始功率分配和数据流选择,然后选用信干噪比(SINR)作为等效信道质量指示(CQI),在总发射功率和误帧率(FER)一定的前提下,根据现有一种迭代算法进一步计算每个数据流上分配的功率及其使用的调制编码模式.仿真结果表明该自适应算法能改善系统吞吐量,且在低信噪比下简化了原来的迭代算法.

关 键 词:多输入多输出  信干噪比  吞吐量  多数据流  MIMO  Systems  系统  改进  适应算法  Scheme  Adaptation  简化  低信噪比  改善  仿真结果  编码模式  调制  使用  发射功率  功率分配  计算  迭代算法  前提  误帧率
文章编号:1006-9348(2007)011-0086-03
收稿时间:2006-09-25
修稿时间:2006-09-27

An Improved Adaptation Scheme for Multi-stream MIMO Systems
LI Jiao-liang,JIANG Ling-ge.An Improved Adaptation Scheme for Multi-stream MIMO Systems[J].Computer Simulation,2007,24(11):86-88,109.
Authors:LI Jiao-liang  JIANG Ling-ge
Abstract:Adaptive multi-input multi-output(MIMO)technology has been proved to be an effective way for improving communication system throughput within the limit of wireless frequency resources.In this paper,an improved adaptation scheme is presented.First,initial power allocation and data streams selection are implemented through Water-Filling algorithm based on singular value decomposition(SVD).Then under certain transmission power and frame error rate(FER),the signal to interference and noise ratio(SINR)is selected as channel quality indicator to calculate the exact power allocation and determine the modulation-coding mode according to an existing iterative algorithm.Simulation results show that this scheme performs better in system throughput.
Keywords:MIMO  Signal to interference and noise ratio(SINR)  Throughput
本文献已被 CNKI 维普 万方数据 等数据库收录!
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