Optimal power control and antenna selection for Multi-User Distributed Antenna System with heterogeneous QoS constraints

In this paper we consider optimal power control and optimal antenna selection problem in a Multi-User Distributed Antenna System (DAS). We consider a two-antenna distributed system with users having heterogeneous quality-of-service (QoS) requirements. We consider two types of users, one is Delay Sensitive (DS) while the other is Delay Tolerant (DT). We develop an optimal algorithm for sum rate maximization subject to QoS constraints of the DS users. Due to high complexity of optimal algorithm we then propose a low complexity sub-optimal algorithm. The performance of sub-optimal algorithm is comparable to that of optimal algorithm with huge complexity reduction.