Patent Document ID: 20130294494
Application ID: 13463974
Patent Flag: 0

Claim One:
1. A method of providing Frequency Domain (FD) Minimum Mean Squared Error (MMSE) equalization in a multi-antenna wireless communication unit having a multi-stage Parallel Interference Cancellation (PIC) receiver and operating in a wireless network that supports multiple transmission layers, the method comprising the steps of: using the PIC receiver, performing initial interference suppression for a total signal received from all receive antennas in the communication unit, the initial interference suppression being performed at each transmission layer-specific detector unit in a first stage of the PIC receiver using transmission layer-specific initial equalization weights applied to the total signal, wherein the total signal includes all signals received by each receive antenna for all transmission layers at a predetermined subcarrier, and wherein the initial interference suppression provides a corresponding equalized layer-specific signal for each transmission layer; using the PIC receiver, processing at least one equalized layer-specific signal to obtain a cleaned-up version of the total signal as a result of initial interference cancellation performed at the first stage of the PIC receiver; and through a second stage of the PIC receiver, applying corresponding transmission layer-specific updated equalization weights to the cleaned-up version of the total signal, wherein the second stage is coupled to the first stage and wherein the transmission layer-specific updated equalization weights are determined without inverting a covariance matrix associated with the cleaned-up version of the total signal.