Patent ID: 8411806
Filing Date: 2013-04-02
Classification: H04B,H04L

Abstract:
1. A method of decoding a plurality of information streams corresponding to a plurality of layers, the plurality of information streams transmitted via a multiple input multiple output (MIMO) communication channel, the method comprising: performing a first matrix decomposition on a channel matrix; preprocessing a plurality of received signals with information from the first matrix decomposition; preprocessing the channel matrix with information from the first matrix decomposition to generate a first modified channel matrix; processing the plurality of received signals to decode information corresponding to a first layer transmitted via at least one first spatial stream; generating a plurality of modified received signals using (i) the decoded information corresponding to the first layer and the plurality of received signals and (ii) the first modified channel matrix; performing a second matrix decomposition on the first modified channel matrix; preprocessing the plurality of modified received signals with information from the second matrix decomposition; processing the first modified channel matrix with information from the second matrix decomposition to generate a second modified channel matrix; generating bit metric values for a second layer using MIMO maximum likelihood (ML) demodulation and using (i) the plurality of modified received signals and (ii) channel and modulation information for interfering signals including the second modified channel matrix, wherein the second layer is transmitted via at least one second spatial stream; and decoding information corresponding to the second layer using the generated bit metric values.