Patent ID: 8355471
Filing Date: 2013-01-15
Classification: H04B,H04J,H04L

Abstract:
1. A method of jointly demodulating and suppressing interference from a plurality of transmitted signals transmitted using a multi-antenna and/or multi-code transmission scheme, comprising: deriving a set of centroid-based values from subsets of constellation points associated with the transmitted signals for input to each non-final stage of a multi-stage demodulator; demodulating a group of signals input to each of the non-final stages using the corresponding set of centroid-based values as constellation points; suppressing residual interference associated with using the set of centroid-based values as constellation points for demodulating the group of signals input to each of the non-final stages; generating a reconstructed signal based on a plurality of localized symbol decisions determined by the non-final stage of the multi-stage demodulator immediately preceding a final stage of the multi-stage demodulator; removing the reconstructed signal from the group of signals input to the non-final stage immediately preceding the final stage to form a group of modified signals input to the final stage of the multi-stage demodulator; and demodulating the group of modified signals input to the final stage of the multi-stage demodulator using the subset of constellation points input to the final stage to determine a final symbol decision for the plurality of transmitted signals.