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Single beamformer for antenna array CDMA systems

journal contribution
posted on 2001-02-01, 00:00 authored by Jinho ChoiJinho Choi, G Hun Lee
In order to combine the signals distributed in the space and time domains, various space-time processing techniques have been proposed. For code division multiple access systems with antenna arrays, the 2D-RAKE combiner has been proposed to combine the signals in the space and time domains. The combiner has multiple beamformers and the number of beamformers is equal to the number of multipaths. In order to reduce the number of beamformers, we propose a combiner with a single beamformer in this paper. Using the maximum signal strength criterion, the spatial and temporal weight vectors are derived for the proposed combiner. It is shown that the proposed combiner can be efficient if the distribution of the multipath signals in the space domain is narrow. To track time-variant channels, an adaptive method to recursively find the spatial and temporal weight vectors is also considered.

History

Journal

Signal processing

Volume

81

Pagination

321-334

Location

Amsterdam, The Netherlands

ISSN

0165-1684

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2001, Elsevier Science B.V.

Issue

2

Publisher

Elsevier

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