Patent ID: 8989320
Filing Date: 2015-03-24
Classification: H04B,H04L

Abstract:
1. A method for wireless communications, comprising: receiving at least one data stream, wherein each data stream from the at least one data stream was transmitted over a wireless channel; performing inner decoding of the at least one data stream using a first set of a priori log-likelihood ratios (LLRs) and a channel matrix comprising estimates of the wireless channel to obtain a first set of extrinsic LLRs of transmitted bits of the at least one data stream; performing outer decoding of the first set of extrinsic LLRs to obtain a second set of a posteriori LLRs and decoded bits of the at least one data stream; cancelling interference of a data stream from the decoded bits and from the second set of a posteriori LLRs of the at least one data stream to obtain a signal with cancelled interference, if the at least one data stream comprises at least two data streams and two or more independent data streams of the at least two data streams were simultaneously transmitted from multiple antennas; and applying feedback processing using the signal with cancelled interference to obtain the channel matrix with updated coefficients and the updated first set of a priori LLRs, wherein the channel matrix with updated coefficients and the updated first set of a priori LLRs will be used for the inner decoding of the signal with cancelled interference, if the two or more independent data streams were simultaneously transmitted from multiple antennas, wherein receiving the at least one data stream comprises receiving one data stream using two receive antennas, and wherein performing inner decoding comprises decoding using a portion of the first set of the a priori log likelihood ratios (LLRs), the received data stream at each receive antenna, and a column of the channel matrix.