基于相关函数的空时块编码系统的信道估计

提出了空时块编码（STBC）系统中基于相关函数的信道估计的方法。当输入符号向量的各个元素互不相关时，接收信号的相关函数有特定的结构，信道矩阵可以从接收信号的相关矩阵的特征向量中得到，信道估计结果和真实值仅相差一个常数。研究还发现当发送信号的相关函数满足特定的条件时，可以直接从接收信号的协方差得到信道参数，而不需要矩阵分解或者求逆运算。

Autocorrelation based channel estimation method for space-time block coding system

An autocorrelation based method was proposed to estimate the channel of the space-time block coding(STBC) system.It is shown that when the inputted symbol vector is spatially white,the autocorrelation of the received signal has specific structure due to the orthogonal property of STBC system.From the eigenvector of the autocorrelation matrix,the channel information can be estimated up to a scalar.When the autocorrelation matrix satisfies certain condition,the esti-mation procedure could be further simplified and the channel was obtained directly from the autocorrelation matrix without any matrix inverse or decomposition operation.