Patent ID: 7400614

Claim:
A method for use in a base station in a CDMA system which includes K mobiles associated with the base station for providing improved downlink diversity, the method comprising the steps of: modulating Walsh codes with data signals respectively associated with at least a portion of the K mobiles to generate transmit signals for respective transmission on M transmit antennas associated with the base station, wherein M is greater than or equal to two, the data signals respectively associated with given mobiles modulate different Walsh codes in generating each transmit signal such that each transmit signal generated comprises a linear combination of respective results of the modulation of each of the different Walsh codes by each of the data signals for the K mobiles, when such a data signal is available for a given mobile; and transmitting the respective transmit signals on the M antennas for receipt by at least a portion of the K mobiles, wherein the transmit signals are correlated using M Walsh codes.