Patent ID: 9590687
Date: 2017-03-07
CPC Classifications: H04B,H04L

Claim:
1. A method in a radio receiver for demodulating data signals transmitted by a plurality of transmitting antennas over a radio channel, the method comprising: receiving, on a plurality of receiving antennas, a data signal and a reference signal, the contents of the reference signal being known a priori to the receiver; calculating, using the contents of the reference signal, an estimated polynomial channel matrix; calculating a decomposition of the estimated polynomial channel matrix into a product of a paraunitary polynomial matrix and an upper triangular polynomial matrix with minimum phase filters on its main diagonal; calculating a polynomial pre-filter matrix as the paraconjugate of the paraunitary polynomial matrix; and demodulating the received data signal where the received data signal is multiplied with the calculated polynomial pre-filter matrix.