存在反馈周期和反馈时延的自适应调制MIMO系统
doi: 10.3724/SP.J.1146.2005.00886
Adaptive Modulation for MIMO Systems with Channel State Information Feedback Periods and Delays
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摘要: 该文研究了反馈信道信息存在的反馈周期和时延对自适应调制MIMO系统的影响，分析了基于奇异值分解的等效并行衰落信道特性，并且给出了接收机的检测方法和一种简化的检测顺序。研究表明，等效并行衰落信道在一定的时间间隔内具有较大的相关性；接收机采用迫零和干扰消除方法可明显提高系统性能。
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关键词:
- MIMO;自适应调制;反馈;分配算法
Abstract: This paper investigates the impact of feedback period and delay on the performance of Multiple-Input Multiple-Output (MIMO) systems with adaptive modulation, and analyzes the characteristics of the equivalent parallel fading subchannels obtained by Singular Value Decomposition (SVD). Its receiver detection method and a simplified detection order are given as well. The results show that the correlation of the subchannels fading remains large within a certain period of time. System's performance can be improved significantly when the Zero Forcing (ZF) and Interference Cancellation (IC) techniques are adopted at the receiver. -
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