DERIVATION OF EIGENVECTORS FOR SPATIAL PROCESSING IN MIMO COMMUNICATION SYSTEMS

摘要

Techniques for deriving eigenvectors based on steered reference and used for spatial processing. A steered reference is a pilot transmission on one eigenmode of a MIMO channel per symbol period using a steering vector for that eigenmode. The steered reference is used to estimate both a matrix .SIGMA. of singular values and a matrix U of left eigenvectors of a channel response matrix H. A matrix U with orthogonalized columns may be derived based on the estimates of .SIGMA. and U, e.g., using QR factorization, minimum square error computation, be used for matched filtering of data transmission received via a first link. The estimate U of or the matrix U may also be used for spatial processing of data transmission on a second link or polar decomposition. The estimates of .SIGMA. and U (or the estimate of .SIGMA. and the matrix U) may (for reciprocal first and second links).