Patent ID: 8976903
Filing Date: 2015-03-10
Classification: H04L

Abstract:
1. A method for wireless communications, the method comprising: receiving, at a receiver, a data stream communicated over a wireless channel; demodulating, at a demodulator, the data stream using a first set of a priori log likelihood ratios (LLRs) of transmitted bits of the data stream, a whitened data stream derived from the data stream, and an entry of a channel matrix to obtain a first set of extrinsic LLRs; processing, at a first processor, the first set of extrinsic LLRs to obtain a second set of a priori LLRs; decoding, at a decoder, the second set of a priori LLRs to obtain a second set of extrinsic LLRs; and processing, at a second processor, the second set of extrinsic LLRs to obtain a third set of a priori LLRs for subsequent demodulation, wherein the receiver, the demodulator, the first processor, the decoder, and the second processor correspond to a demodulation architecture, wherein the demodulation architecture is configured to process Multiple-Input-Multiple-Output (MIMO) data streams and Single-Input-Single-Output (SISO) data streams, wherein a particular set of a priori LLRs is determined based on one or more sets of entries of the channel matrix when one or more MIMO data streams are processed, and wherein the particular set of a priori LLRs is determined based on a single entry of the channel matrix when a SISO data stream is processed.