Title :
Transmit diversity schemes for CDMA-2000
Author :
Rajan, Dinesh ; Gray, Steven D.
Author_Institution :
Rice Univ., Houston, TX, USA
Abstract :
Transmit diversity offers an advantage in the forward link of the cdma2000 system by balancing the spectrum efficiency in the uplink and downlink. Three schemes for performing transmit diversity are examined in this paper-orthogonal transmit diversity, time switched transmit diversity, and selection transmit diversity for vehicular, indoor-outdoor pedestrian and indoor office environments. Also considered are some issues related to implementation complexity in the mobile handset. Under certain channel conditions, we show that low rate feedback of antenna selection and no forward link power control offers performance advantages over transmit diversity schemes with forward link power control and no antenna selection
Keywords :
cellular radio; code division multiple access; diversity reception; fading channels; indoor radio; CDMA-2000; antenna selection; cdma2000 system; cellular radio; downlink; forward link; indoor office environment; indoor-outdoor pedestrian environment; low rate feedback; mobile handset; orthogonal transmit diversity; selection transmit diversity; spectrum efficiency; third generation mobile radio; time switched transmit diversity; transmit diversity schemes; uplink; vehicular environment; Antenna feeds; Delay; Downlink; Fading; Feedback; Indoor environments; Mobile handsets; Power control; Receiving antennas; Transmitting antennas;
Conference_Titel :
Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5668-3
DOI :
10.1109/WCNC.1999.796728
