Title :
A novel space-time pre-multiuser downlink transmission scheme suitable for TDD-CDMA systems
Author :
Wang, Wenjie ; Wu, Xiaojun ; Yin, Qinye
Author_Institution :
Inst. of Inf. Eng., Xi´´an Jiaotong Univ., China
Abstract :
The conventional downlink selective transmission method is extended from the space domain to the space-time domain. Based on the cascade and joint processing in space-time domain, a so-called temporal beamformer and a space-time beamformer are presented. Then a novel downlink selective transmission scheme suitable for TDD-CDMA systems is proposed. The theoretical analysis and computer simulations demonstrate that the interference canceling performance of our approach is superior to that of the conventional spatial beamformer by sufficiently utilizing the space-time signature of mobile users. The proposed space-time joint method is superior to the space-time cascade method in terms of the interference canceling performance
Keywords :
code division multiple access; interference suppression; land mobile radio; multiuser channels; radio links; radiofrequency interference; space-time adaptive processing; spread spectrum communication; DS-CDMA mobile radio network; TDD-CDMA systems; computer simulations; downlink selective transmission method; interference canceling performance; mobile radio; space-time beamformer; space-time cascade method; space-time domain processing; space-time pre-multiuser downlink transmission; space-time signature; temporal beamformer; Antenna arrays; Base stations; Computer simulation; Downlink; Frequency; Interference cancellation; Mobile computing; Multiaccess communication; Performance analysis; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944828
