Patent ID: 8711985
Filing Date: 2014-04-29
Classification: H04B,H04L

Abstract:
1. A method for decoding a Multi User (MU) Multiple Input Multiple Output (MIMO) signal, comprising: receiving an MU-MIMO signal at a mobile communication device, wherein the MU-MIMO signal includes a plurality of tones, with each tone containing a symbol vector having a plurality of symbols, wherein the mobile communication device is assigned to receive a selected symbol in the symbol vector in each tone to form a stream of symbols from the plurality of tones; identifying a channel response matrix for a portion of each tone that is related to the selected symbol in each tone; applying spatial whitening to each of the plurality of tones using an average of a co-user interference plus noise matrix over a selected number of tones to spatially whiten each tone; applying spatial whitening to the channel response matrix corresponding with each of the plurality of tones using the average of the co-user interference plus noise matrix to form a spatially whitened channel response matrix; and performing maximal ratio combining for each spatially whitened tone with the corresponding spatially whitened channel response matrix to decode the stream of symbols for the mobile communication device out of the spatially whitened tones.