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Diversity gain for CDMA systems equipped with antenna arrays

journal contribution
posted on 2003-05-01, 00:00 authored by Jinho Choi, S Choi
If the angular spread is not zero, the diversity gain can be achieved in the antenna-array reception. In order to achieve the diversity gain, we propose a beamforming method that utilizes two beamforming weight vectors and apply this beamforming technique to code-division multiple-access (CDMA) systems equipped with antenna arrays under a time-varying multipath-fading channel environment. In the proposed beamforming method, the channel vector has been estimated using two basis vectors that span the signal subspace. Since the proposed beamforming method utilizes two-dimensional (2-D) signal subspace, it provides better performance than the conventional beamforming method, which utilizes one-dimensional signal subspace. Through simulation results, we can see that the performance is improved as the angular spread gets larger.

History

Journal

IEEE transactions on vehicular technology

Volume

52

Pagination

720-725

Location

Piscataway, N.J.

ISSN

0018-9545

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2003, IEEE

Issue

3

Publisher

Institute of Electrical and Electronics Engineers

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