A Novel Transmission Diversity System in TDD-CDMA

Incheol JEONG  Masao NAKAGAWA  

IEICE TRANSACTIONS on Communications   Vol.E81-B   No.7   pp.1409-1416
Publication Date: 1998/07/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Third Generation Land Mobile Communication Systems)
direct sequence spread spectrum,  code division multiple access,  pre-rake,  transmission diversity,  time division duplex,  

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This paper presents a novel transmission diversity scheme for code division multiple access system. Conventional diversity receivers in mobile stations require space and complicated circuits, however, the proposed diversity schemes present significant diversity effect without any diversity equipment at the mobile station. It is possible to use the transmitter diversity at the base station by using the feature of time division duplex (TDD) which has strongly correlated fading patterns in both forward and reverse link. Computer simulation is performed to evaluate the performance of the proposed systems for single user environment. The performance of the system 1, which select best situated antenna, is analyzed and the BER performance for multiple access is presented.