Fairness-Aware Resource Allocation for the SISO Downlink over Frequency-Selective Channels

The problem of resource allocation for the downlink of wireless systems operating over a frequency-selective channel is investigated. It is assumed that both the Base Station (BS) and each user are equipped with a single antenna (Single Input Single Output - SISO case) and Orthogonal Frequency Division Multiple Access (OFDMA) is used as a multiple access scheme. A suboptimal, but efficient scheme is devised in order to maximize the sum of the users' data rates subject to constraints on total available power and proportional fairness among users' data rates. It is shown, via simulation, that the proposed resource allocation scheme not only achieves higher sum of the users' data rates than other existing schemes but also sum data rate is distributed fairly and flexibly among users. Thus, the scheme can be applied to latest-generation wireless systems that provide Quality-of-Service guarantees.

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