Patent ID: 6831944
Filing Date: 2004-12-14
Classification: G06F,H04B,H04L

Abstract:
A method for use at a receiver of retrieving data from a plurality of data signals transmitted in a communication system, the method comprising:receiving the plurality of transmitted data signals at the receiver and measuring a channel response associated with the transmitted data signals; determining a system response based on in part the channel response; expanding the system response to be piece wise orthogonal; retrieving data from the received data signals based on in part the expanded system response, wherein the data retrieving comprises QR decomposing the expanded system response into an R matrix which is an upper triangular matrix and a Q matrix which is an orthogonal matrix, the system response is a system response matrix, dividing the system response matrix into blocks of columns prior to the expanding, and replacing elements of a column block with sub-blocks prior to the expanding; and orthogonalizing a periodic portion of the Q matrix by orthogonalizing the sub-blocks.