Title :
Performance analysis of down link time switched transmit diversity (TSTD) in W-CDMA system
Author :
Lee, Hyeon Woo ; Yeom, Jaeheung ; Sung, Dan Keun
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea
Abstract :
The TSTD scheme is a simple, effective transmit diversity method that can increase down-link capacity in CDMA systems. It shows considerable gain compared to non-diversity mode with or without power control for 8 kbps voice services as well as 64 kbps data services. In comparison to other open loop transmit diversity schemes, TSTD has similar performance in mobile speeds from 3 km/h up to 120 km/h, and requires least complexity. It requires only one switch and one additional RF/IF block in the base station (BS) and no additional components in the mobile station (MS) because channel estimation and modulation for each slot is performed basically slot by slot basis. From the viewpoint of both complexity and performance, the TSTD scheme can be one of candidates of down link transmit diversity schemes in 3rd generation CDMA systems
Keywords :
broadband networks; code division multiple access; diversity reception; land mobile radio; modulation; multiuser channels; parameter estimation; radio links; radio networks; 64 kbit/s; 8 kbit/s; RF/IF block; W-CDMA system; base station; channel estimation; complexity; data services; down link time switched transmit diversity; down-link capacity; gain; mobile speeds; mobile station; modulation; nondiversity mode; open loop transmit diversity; performance analysis; power control; third generation CDMA systems; voice services; Diversity methods; Error correction; Fading; Frequency domain analysis; Multiaccess communication; Performance analysis; Power control; Radio frequency; Switches; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851520
