Power control possiblities are explored for the downlink of a Time-Division Duplex (TDD) CDMA system while employing three different kinds of multipath diversity combining schemes namely the RAKE, the pre-RAKE  and the transmit antenna pre-selection. In the latter two, knowledge of the channel characterstics is employed at the base-station to provide maximum decoupling between users on the downlink. Performance of the these receivers is compared in a Rayleigh fading urban environment. It is shown that power control is absolutely indispensible in the latter two schemes and results in considerable performance gains as compared to the RAKE receiver.
Power control for diversity reception in time-division duplex CDMA
VTC 1998, 48th IEEE annual international vehicular technology conference, May 18-21, 1998 Ottawa, Ontario, Canada
Systèmes de Communication
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