A survey of energy efficient wireless communications
Reducing energy consumption in wireless communications has attracted increasing attention recently. Advanced physical layer techniques such as multiple input multiple output (MIMO) and orthogonal frequency division multiplexing (OFDM) cognitive radio, network coding, cooperative communication, etc. new network architectures such as heterogeneous networks, distributed antennas, multi hop cellulars, etc. as well as radio and network resource management schemes such as various cross layer optimization algorithms, dynamic power saving, multiple radio access technologies coordination, etc. have been proposed to address this issue. In this article, we overview these technologies and present the state of the art on each aspect. Some challenges that need to be solved in the area are also described.
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