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Forward Link Performance of Pre-Rake TDD-CDMA systems with Multi-Antenna  

Jeong, In-Cheol (성공회대학교 정보통신공학과)
Rhi, Jae-Young (성공회대학교 멀티미디어시스템공학과)
Publication Information
Journal of Satellite, Information and Communications / v.6, no.2, 2011 , pp. 20-25 More about this Journal
Abstract
The authors have proposed novel TDD-CDMA systems with Pre-Rake transmit diversity schemes (system 1 and system 2) using multiple transmit antennas in [2] and have also evaluated the system performance through the theoretical analysis and computer simulation. However, the performance of system 2 which transmit a signal using all antennas has not been evaluated for multi-user environment. Therefore in this paper, we analyze the performance of system 2 for multi-user environment and compare the performance with that of the already proposed system 1 which chooses only one antenna. From the numerical results, it is found that system 2 outperforms system 1 as the number of users increases while system 1 outperforms system 2 at a small number of users. Therefore in order to achieve the best system performance, the Pre-Rake transmit diversity type should be selected at the base station according to the number of users.
Keywords
Time Division Duplex; Pre-Rake; CDMA; Transmit Diversity; Multipath fading;
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