Distributed Antenna Selection for OFDM Space-Time Block Coded Diversity

Abstract

Antenna selection is an important issue for a distributed anten-na-based small-cell network (DAN). This paper proposes a dis-tributed antenna (DA) selection for DAN downlink using orthog-onal frequency division multiplexing (OFDM) and space-time block coded (STBC) diversity. The proposed DA selection is an iterative algorithm which determines DA groups (each group consists of DAs communicating with a different user equipment (UE)) to maximize the downlink sum capacity by taking into ac-count co-channel interference (CCI). In each iteration, one DA is added/removed to/from one of current DA groups if this increases the sum capacity by the largest amount. This is repeated until the sum capacity starts to decrease or by the prescribed number of times. It is shown by computer simulation that the proposed DA selection algorithm increases the 10% outage sum capacity by about 20% compared to the received signal power-based DA selection (no CCI is considered).