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Most of the resource allocation literature on the energy-efficient orthogonal frequency division multiple access (OFDMA)-based wireless communication systems assume continuous power allocation/control, while, in practice, the power levels are discrete (such as in 3GPP LTE). This convenient continuous power assumption has mainly been due to either the limitations of the used optimization tools and/or...
This paper addresses an energy-efficiency (EE) maximized resource allocation (RA) problem for a downlink orthogonal frequency division multiple-access (OFDMA) network, when the system's total power (including transmission power and fixed circuit power) is constrained below a peak value. The EE is evaluated by the number of message bits delivered corresponding to per Joule energy consumed by the whole...
This paper develops a sum-power minimized resource allocation (RA) algorithm subject to a sum-rate constraint for cooperative orthogonal frequency division modulation (OFDM) transmission with subcarrier-pair based opportunistic decode-and-forward (DF) relaying. The improved DF protocol first proposed in is used with optimized subcarrier pairing. Instrumental to the RA algorithm design is appropriate...
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