Patent ID: 7298804

Claim:
A receiver for receiving complex symbols in a radio communication system, comprising: a symbol arranger for collecting signals from at least one receiver antenna over four time intervals, the at least one receiver antenna receiving the signals from at least three transmitter antennas; a channel estimator for estimating at least three channel gains from the at least three transmitter antennas to the at least one receiver antenna; a first decoder for computing metrics for all possible pairs of symbols using the received signals and the channel gains, and for detecting two symbols giving a minimum metric; a second decoder for computing metrics for all possible pairs of symbols using the received signals and the channel gains, and for detecting two symbols giving a minimum metric; and a parallel-to-serial converter for arranging the four symbols detected by the first and second decoders in the right order, wherein the first and second decoders each linearly operate the received signals with the channel gains, pre-detect two symbols using threshold detection, and output the pre-detected two symbols as final symbols if the product of the product of the pre-detected symbols and a constant determined by the channel gains is a minimum.