Hybrid Link Adaptation for ICI Adjustment in OFDMA Cellular Uplink Systems

Abstract

In orthogonal frequency division multiple access (OFDMA)-based uplink systems, it may not be feasible to exploit the rate adaptation due to severe intercarrier interference (ICI). In this paper, we propose a novel hybrid link adaptation scheme that employs power adaptation for ICI adjustment and rate adaptation for capacity improvement in OFDMAbased uplink systems. The proposed scheme determines the maximum allowable transmit power in response to the channel gain and mobility of the user, guaranteeing the carrier to interference power ratio (CIR) loss of all users.