DOWNLINK STRATEGIES USING ANTENNA ARRAYS FOR INTERFERENCE MITIGATION IN MULTI-CARRIER CDMA

摘要

The paper considers transmitter strategies for interference mitigation in the downlink of a multi-carrier CDMA system using antenna arrays. We describe typical indoor and outdoor scenarios and derive the corresponding transmitter strategy according to the channel knowledge available at the base station for each case. We show the effectiveness of multi-user space-frequency transmit filtering for the indoor and single-user beamforming for the outdoor scenario. Both strategies considerably reduce the multiple access interference and thus allow a low-complexity receiver design for the mobile terminal.