METHOD AND APPARATUS FOR DETECTING RECEIVED SIGNAL IN A COMMUNICATION SYSTEM

摘要

A method for detecting received signal for applying multiple antenna technology in communication system and an apparatus thereof are provided to improve BER(Bit Error Rate) in DSTTD(Double Space Time Transmit Diversity)-OFDM(Orthogonal Frequency Division Multiplexing) system by detecting a received signal by repetitive decision feedback mode. A transmitting part comprises a modulating part and STTD(Space Time Transmit Diversity) units. A receiving part comprises a white gaussian noise adding part, a DSTTD detecting part, and a demodulating part. The modulating part modulates an input bit stream, converts the input bit stream, and outputs transmitting symbols into the STTD unit. A receiving part receives the transmitting symbols by an antenna, and outputs to the white gaussian noise adding part. The white gaussian noise adding part adds a white Gaussian noise to the received symbols. A signal detecting part detects a subcarrier received signal by unbiased-MMSE(Minimum Mean Squared Error) DF(Decision Feedback) mode.