Patent ID: 8619910
Filing Date: 2013-12-31
Classification: H04B,H04L

Abstract:
1. A method for decoding a signal vector in a multiple-input multiple-output (MIMO) hybrid automatic repeat request (HARQ) transmission scheme, the method comprising: receiving multiple signal vectors corresponding to multiple asynchronous transmissions of a common transmit signal vector, the received signal vectors comprising a first signal vector corresponding to a transmission of the common transmit signal vector and a second signal vector corresponding to a retransmission of the common transmit signal vector, wherein each of the received signal vectors is associated with a channel state matrix; concatenating the received signal vectors into a combined received signal vector; concatenating each channel state matrix associated with the received signal vectors into a combined channel state matrix; after the concatenations, matched filtering the combined received signal vector using the combined channel state matrix; decision feedback equalizing the matched filtered combined received signal vector, wherein the decision feedback equalizing comprises incrementally computing a projected received signal, {tilde over (w)} and where a QR decomposition of the channel state matrix for the n-th transmission of the common transmit signal vector {tilde over (H)} n is given by and where H decoding an estimated transmit signal vector from the equalized combined received signal vector.