MIMO系统中基于空时分组码的信道盲估计算法

Method of Blind Channel Estimation for Space Time Block Code

提出了一种基于空时分组码的信道盲估计算法,算法利用空时码的码构造进行盲估计。通过对信道输出进行子空间分解发现,如果信号子空间完全由信道参数确定,则可以对信道参数进行估计。该算法针对的是一般的空时分组码结构,文中通过仿真验证了一些特殊的分组码的信道估计性能。

Delay diversity modulation was shown to be a feasible scheme in space -time modulation. Blind channel estimation of delay diversity modulation is considered. Frequency-selective channel is aUowed The multiple-input- multiple-output channel can be converted into a special single-input-multiple-output channe if the delay is not less than the channel order. Subspace decomposition is applied to the channel output and we show that the channd can be estimated. Simulation results give some illustrative examples.