SIGNALTRANSMITTING AND RECEIVING METHOD IN A CLOSED-LOOP SPACE-TIME DIVERSITY SYSTEM HAVING A PLURALITY OF TRANSMISSION ANTENNAS AND RADIO COMMUNICATION TRANSMITTING AND RECEIVING APPARATUS THEREFOR

摘要

A closed-loop STTD system extended from an open-loop STTD system adopting four antennas transmission diversity technique and its signal transmitting method are disclosed. The signal transmitting method in a closed-loop space-time transmit diversity (STTD) system having a plurality of transmission antennas, comprises space-time coding symbols to be transmitted, classifying the coded symbols to certain groups and multiplying different weight values to each transmission symbol group and transmitting them.