In this paper, we address the problem of ill-conditioning Wiener filter, optimal linear minimum mean square error estimator. Computing filter involves inverse observation covariance matrix. practice, matrix has a large condition number, resulting in unreliable numerical computation filter. To issue, develop four approximate formulas using truncation technique based on principal components compo...

Real-time matrix inversion is a key enabling technology in multiple-input multiple-output (MIMO) communications systems, such as 802.11n. To date, however, no matrix inversion implementation has been devised which supports real-time operation for these standards. In this paper, we overcome this barrier by presenting a novel matrix inversion algorithm which is ideally suited to high performance ...