Title :
Blind multi-user detectors exploiting spatial diversity in DS-CDMA downlink
Author :
Ali, Hassan ; Doucet, Arnaud ; Zoubir, Abdelhak M.
Author_Institution :
Commun. & Signal Process. Group, Curtin Univ. of Technol., Perth, WA, Australia
Abstract :
We propose second-order-statistics (SOS) based spatial diversity exploiting the subspace methods to blindly identify the downlink channel of direct sequence-code division multiple access (DS-CDMA) systems. Once the channel has been identified, a linear receiver is used to recover the transmitted symbols. The new techniques supports 100% loading. It is shown that base on the identified signal subspace and the channel parameters, linear detectors can be constructed in closed form at a reduced computational cost.
Keywords :
3G mobile communication; antenna arrays; channel estimation; code division multiple access; diversity reception; interference suppression; least mean squares methods; multiuser detection; radio links; radio receivers; radiofrequency interference; spread spectrum communication; statistics; DS-CDMA downlink; MMSE detectors; blind multiuser detectors; channel estimation; channel identification; channel impulse response; direct sequence-code division multiple access; interblock interference; linear receiver; second-order-statistics; spatial diversity; subspace methods; zero-forcing methods; Antennas and propagation; Base stations; Detectors; Downlink; Finite impulse response filter; Multiaccess communication; Multiuser detection; Receiving antennas; Signal processing; Statistics;
Conference_Titel :
Signal Processing and Information Technology, 2003. ISSPIT 2003. Proceedings of the 3rd IEEE International Symposium on
Print_ISBN :
0-7803-8292-7
DOI :
10.1109/ISSPIT.2003.1341048
