We investigate the optimization of antenna port selection in the downlink of a cloud radio access network in which a user terminal can be served by multiple ports. The goal is to maximize the minimum weighted signal-to-interference-plus-noise ratios observed by the users while satisfying their quality-of-service requirements. This optimization is formulated as a mixed integer programming problem and solved using semidefinite relaxation and Gaussian randomization. It is shown that our technique outperforms baseline schemes by 6-8 dB.

Additional Metadata
Keywords antenna selection, C-RAN, Distributed antennas
Persistent URL dx.doi.org/10.1109/LCOMM.2016.2628380
Journal IEEE Communications Letters
Bulu, G. (Gurhan), Ahmad, T. (Talha), Gohary, R, Toker, C. (Cenk), & Yanikomeroglu, H. (2017). Antenna port selection in a coordinated cloud radio access network. IEEE Communications Letters, 21(3), 588–591. doi:10.1109/LCOMM.2016.2628380