Title :
Performance evaluation of joint beamforming and power control CDMA system with RAKE combining
Author :
Choi, Young-Kwan ; Han, Jin-Kyu ; Kim, Dae-Hyun ; Ahn, Cheol-Yong ; Kim, Dong Ku
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
fDate :
6/24/1905 12:00:00 AM
Abstract :
We propose an algorithm for forward link beamforming jointly with power control and RAKE combining, which the total transmit power is minimized and effective signal-to-interference and noise ratio (SINR) at each mobile is grater than the target SINR at the same time. In the algorithm, the beamforming weight vectors are determined by the virtual uplink SINR maximization criterion, and the multipath combining weight vectors are selected by minimum mean squared error (MMSE) criterion. The virtual uplink SINR maximization beamforming schemes can reduce the total transmit power compared to the maximal ratio transmission (MRT) schemes through system level simulation. It is observed that diversity gain is obtained by mobile equipped with the multipath combiner.
Keywords :
array signal processing; cellular radio; code division multiple access; direction-of-arrival estimation; diversity reception; fading channels; multipath channels; multiuser channels; power control; radio links; radiofrequency interference; telecommunication control; CDMA system; DOA; RAKE combining; beamforming weight vectors; cellular radio; direction of arrival; diversity gain; forward link beamforming algorithm; maximal ratio transmission; mobile radio; multipath combiner; multiple access interference; performance evaluation; power control; signal-to-interference and noise ratio; system level simulation; transmit power reduction; virtual uplink SINR maximization; Array signal processing; Base stations; Diversity methods; Diversity reception; Downlink; Interference; Multiaccess communication; Power control; Signal to noise ratio; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th
Print_ISBN :
0-7803-7484-3
DOI :
10.1109/VTC.2002.1002685
