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Indexed by:期刊论文

Date of Publication:2011-09-01

Journal:ICIC Express Letters

Included Journals:EI、Scopus

Volume:5

Issue:9 A

Page Number:3095-3100

ISSN No.:1881803X

Abstract:In the conventional Space-Division Multiple-Access (SDMA) scheme, Direction-of-Arrival (DoA) estimation and beamforming are usually performed sequentially and independently. Such a cascade structure may transmit the error or deviation from the DoA stage to the beamforming stage. Two of the main reasons for such an error or deviation are the effect of imprecise array manifold and the effect of finite sample size. The deviation, especially the error may subsequently lead a beamformer to produce a beam pointing in wrong DoA that can severely degrade the performance of the beam-former. To address this problem, we propose a robust algorithm both for DoA estimation and for beamforming using the constant modulus (CM) feature. In the algorithm, the DoA estimation and the beamforming are no longer independent but work in an inter cooperative way. In this way, the robustness of DoA estimation and beamforming can be improved simultaneously. Finally, numerical experiments show the effectiveness of the proposed method. ? ICIC International 2011.