Patent ID: 8351529
Filing Date: 2013-01-08
Classification: H04L

Abstract:
1. A method for detecting sequences of digitally modulated symbols, the method comprising: determining a real-domain representation that separately treats real in-phase and real quadrature components of a received vector, channel gains, and a transmitted vector transmitted by multiple sources and received at a receiver, wherein a number of receive antennas is one less than a number of transmit antennas; processing the real-domain representation by factorizing a channel matrix into an orthogonal matrix and a triangular matrix and eliminating two rows of the triangular matrix; and performing, at the receiver, at least one of: (i) hard decision detection of a transmitted sequence and demapping of corresponding bits based on a reduced complexity search of a number of transmit sequences, and (ii) generation of bit soft-output values based on the reduced complexity search of the number of transmit sequences, the reduced complexity search based on the triangular matrix.