Resource Allocation for the AF Multiple Access Relay Channel With OFDMA

Provided by: Institute of Electrical & Electronic Engineers
Topic: Networking
Format: PDF
This paper considers the resource allocation problem for a Multiple Access Relay Channel (MARC). A transmission scheme with OFDMA and Amplify-and-Forward (AF) relaying is assumed. To maximise the sum rate a joint allocation of transmit power and subcarriers has to be done. This problem is known to be NP-hard and can only be solved by an exhaustive search which is not feasible for practical problem sizes. Different near-optimum algorithms for solving this problem are proposed. The problem of carrier and power allocation can either be done separately or jointly.

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