A cooperative antenna selection algorithm for MIMO-OFDMA networks

Abstract

In this paper, the performance of a proposed antenna selection (AS) scheme for Multiple Input Multiple Output (MIMO) networks is evaluated, where the Orthogonal Frequency Division Multiple Access (OFDMA) physical layer protocol is employed. The proposed AS algorithm is based on the maximization of the ratio of desired user's signal power to the interference power caused to the network. Performance metrics are derived, such as the mean number of active users for various modulation types and services, after a sufficient number of Monte Carlo simulations. As results indicate, our proposed AS approach can provide significant throughput gain especially in cases of high data rates per active user. In particular, for three allocated subcarriers per MS, 16-QAM modulation type and 10% blocking probability, this strategy provides 33% gain on the mean number of active users compared to the case where interference is neglected during antenna selection.