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Adaptive Wideband Beamforming with Mainlobe Control Using Iterative Second-Order Cone Programming
Jie LI Gang WEI
Publication
IEICE TRANSACTIONS on Communications
Vol.E95-B
No.10
pp.3290-3293 Publication Date: 2012/10/01 Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.3290 Print ISSN: 0916-8516 Type of Manuscript: LETTER Category: Fundamental Theories for Communications Keyword: wideband beamformer, constraints on mainlobe response, second-order cone programming (SOCP), frequency invariance property,
Full Text: PDF(408.7KB)>>
Summary:
A wideband beamformer with mainlobe control is proposed. To make the beamformer robust against pointing errors, inequality rather than equality constraints are used to restrict the mainlobe response, thus more degrees of freedom are saved. The constraints involved are nonconvex, therefore are linearly approximated so that the beamformer can be obtained by iterating a second-order cone program. Moreover, the response variance element is introduced to achieve a frequency invariant beamwidth. The effectiveness of the technique is demonstrated by numerical examples.
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