Title :
Virtual uplink beamforming and power control for space-time coding scheme in DS-CDMA systems with two array antennas
Author :
Sun, Xiao-Ying ; Wang, Shu-xun ; Hu, Feng-Ye
Author_Institution :
Inst. of Commun. Eng., Jilin Univ., Changchun, China
Abstract :
Virtual uplink beamforming and power control technique (V-UBPCT) is an effective means for improving downlink performance in DS-CDMA systems. We present a modified V-UBPCT algorithm for block space-time coding scheme with two array antennas, in which the downlink beamforming weight and transmitted power vectors are generated iteratively when the total transmitted power is minimized while received signal-to-interference-and-noise (SINR) requirements are maintained. Simulations compare the total transmitted power and SINR between conventional orthogonal space-time coding scheme and our method.
Keywords :
antenna arrays; array signal processing; block codes; code division multiple access; interference (signal); iterative methods; power control; radio receivers; space-time codes; SINR; array antennas; block space time coding; code division multiple access; direct sequence CDMA system; downlink beamforming; iterative algorithm; orthogonal space time coding; power control; power vectors; signal to interference plus noise ratio; virtual uplink beamforming; Antenna arrays; Array signal processing; Downlink; Iterative algorithms; Multiaccess communication; Power control; Power generation; Receiving antennas; Signal to noise ratio; Transmitting antennas;
Conference_Titel :
Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
0-7803-7702-8
DOI :
10.1109/ICNNSP.2003.1281152
