Title :
Space-time pre-RAKE multiuser transmitter precoding for DS-CDMA systems
Author :
Guncavdi, Secin ; Duel-Hallen, Alexandra
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
A novel linear precoding method that combines multiuser interference (MAI) cancellation, pre-RAKE filtering and transmitter (Tx) antenna diversity is proposed for the downlink of the code division multiple access (CDMA) channel. It is demonstrated that this method has better performance than single user space-time pre-RAKE precoding with relatively low increase in complexity. In addition, several novel and previously proposed MAI cancellation methods for the uplink and downlink are compared. Long range prediction is employed to enable performance of Tx precoding for rapidly time varying fading CDMA channels.
Keywords :
Rayleigh channels; antenna arrays; code division multiple access; diversity reception; interference suppression; mobile radio; multipath channels; multiuser detection; radio receivers; space-time codes; spread spectrum communication; time-varying channels; transmitting antennas; DS-CDMA; MAI cancellation; direct-sequence code division multiple access; linear precoding method; multiuser interference; pre-RAKE filtering; space-time pre-RAKE precoding; time varying fading channel; transmitter antenna diversity; Computational complexity; Degradation; Diversity reception; Downlink; Fading; Filtering; Multiaccess communication; Multiple access interference; Multiuser detection; Transmitters;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1285962
