Power Allocation For Direct/Cooperative Relay Switching With SC-FDMA Using Spectrum Division/Adaptive Subcarrier Allocation

Abstract In this paper, we propose a power allocation method that maximizes the uplink capacity of the cooperative amplify-and-forward (AF) relay using direct/cooperative relay switching and spectrum division/adaptive subcarrier allocation (SDASA). When the cooperative relay is selected, the proposed power allocation method adaptively allocates the transmit power between a mobile terminal (MT) and a relay station (RS) according to the conditions of MT-RS and RS-base station (BS) links. We show by computer simulation that the proposed power allocation method can achieve almost the same channel capacity as the greedy power allocation method. Keyword Cooperative AF relay, direct/cooperative relay switching, spectrum division/adaptive subcarrier allocation

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