Patent ID: 7415001
Filing Date: 2008-08-19
Classification: H04B,H04L

Abstract:
1. A method for processing a multi-user signal, the method comprising an iterative receiver process and including: (a) receiving a signal transmission including a plurality of user signals on a TDMA channel; (b) detecting one or more user signals and determining transmission channel estimates for each said user signal; (c) deriving a soft signal for a first user by subtracting, if available, weighted representations of other user signals from the detected user signal of said first user; (d) calculating a posteriori probabilities for each symbol comprising the soft signal; (e) refining said probabilities utilising the transmission channel estimate for the first user in an iterative decoding algorithm, wherein a probability is either partially or fully decoded depending on application of decoder convergence criteria; and returning to (a), (b) or (c) with the refined probabilities forming part of the weighted representations to be subtracted from detected user signals of other users.