Authors
Yong Cheng, Marius Pesavento
Publication date
2015/1/16
Journal
IEEE Transactions on Signal Processing
Volume
63
Issue
7
Pages
1750-1764
Publisher
IEEE
Description
Multiuser downlink beamforming for sum-rate maximization has been intensively studied in the literature assuming that the achievable data rates of the mobile stations (MSs) are continuous and strictly increasing functions of the received signal-to-interference-plus-noise ratios (SINRs). However, in practical cellular networks that employ adaptive modulation and coding, the data rates of the MSs are determined by the specific modulation and coding schemes and thus attain discrete values. We consider in this paper discrete rate adaptation and downlink beamforming (RAB), where the discrete rate assignment is jointly optimized along with the beamformer design to achieve the maximum sum-rate with minimum total transmitted power of the base station. User admission control is embedded in the discrete rate assignment procedure. We address the RAB problem using a mixed integer second-order cone program (MI …
Scholar articles
Y Cheng, M Pesavento - IEEE Transactions on Signal Processing, 2015