Coordinated beamforming using semidefinite programming

Article


Le, T. and Nakhai, M. 2012. Coordinated beamforming using semidefinite programming. IEEE International Conference on Communications (ICC). https://doi.org/10.1109/ICC.2012.6364232
TypeArticle
TitleCoordinated beamforming using semidefinite programming
AuthorsLe, T. and Nakhai, M.
Abstract

In this paper, we study a coordinated beamforming (CBF) scheme for a multi-cell scenario where precoding/beamforming vectors for all coordinating base stations (BSs) are jointly designed in a manner that each BS transmits to its local users. We minimise the total transmit power across coordinating BSs while keeping the signal-to-interference-plus-noise ratio (SINR) at each user above the required level. We formulate the optimisation problem for CBF in a standard semidefinite programming form using instantaneous channel state information. Then, taking into consideration the uncertainty in the estimation of channel covariance matrix, we formulate the CBF problem based on the second order statistical properties of channel so that the robustness of the designed system parameters is guaranteed within a tolerable channel estimation error. We show that, although this robustness comes at the expense of increased overall power, a significant reduction in signaling overhead can be attained with a minor increase in total transmit power at moderately low SINRs.

LanguageEnglish
PublisherIEEE
JournalIEEE International Conference on Communications (ICC)
ISSN1550-3607
Publication dates
Print10 Jun 2012
Publication process dates
Deposited08 Jun 2015
Output statusPublished
Digital Object Identifier (DOI)https://doi.org/10.1109/ICC.2012.6364232
Page range3790 -3794
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