We address the max-min fairness design problem for a MU-MISO system with partial Channel State Information (CSI) at the Base Station (BS), consisting of an imperfect channel estimate and statistical knowledge of the estimation error, and perfect CSI at the receivers. The objective is to maximize the minimum Average Rate (AR) among users subject to a transmit power constraint. An unconventional transmission scheme is adopted where the Base Station (BS) transmits a common message in addition to the conventional private messages. In situations where the CSIT is not accurate enough to perform interference nulling, individual rates are assisted by allocating parts of the common message to different users according to their needs. The AR problem is transformed into an augmented AverageWeighted Mean Square Error (AWMSE) problem, solved using Alternating Optimization (AO). The benefits of incorporating the common message are demonstrated through simulations.
|Title of host publication
|2015 IEEE International Conference on Communications, ICC 2015
|Institute of Electrical and Electronics Engineers Inc.
|Number of pages
|Published - 2015 Sept 9
|IEEE International Conference on Communications, ICC 2015 - London, United Kingdom
Duration: 2015 Jun 8 → 2015 Jun 12
|IEEE International Conference on Communications, ICC 2015
|15/6/8 → 15/6/12
- max-min fairness
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Networks and Communications