摘要
在深入分析MIMO OFDM系统信道模型的基础上 ,提出了一种新的导频符号设计方案和采用最大似然比估计算法估计MIMO OFDM信道 ,并分析了该算法的性能 ;计算机仿真结果表明在信道统计特性未知的条件下 ,采用所提出的导频符号设计方案效率高 ,估计性能优于RRE和LE等其他方法。
Based on the analysis of the model of MIMO-OFDM systems, a novel scheme of pilot symbols and the maximum likelihood estimation method are proposed to estimate the MIMO-OFDM channel, and the performance of the scheme is analyzed. The result of computer simulation shows that under the conditions of having no any knowledge of the channel statistics and the SNR, the efficiency of pilot symbols is high and the performance of the proposed scheme is superior to that of other methods, such as RRE and LE.
出处
《电波科学学报》
EI
CSCD
2004年第1期53-57,共5页
Chinese Journal of Radio Science
基金
国家自然科学基金资助项目 (No .6 0 172 0 30 )
关键词
MIMO-OFDM系统
信道最大似然估计
信道模型
移动通信
通信质量
Algorithms
Computer simulation
Mathematical models
Maximum likelihood estimation
Orthogonal frequency division multiplexing
Signal to noise ratio
