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This work considers communication over Gaussian interference channels withprocessing energy cost, which explicitly takes into account the energy expendedfor processing when transmitters are on. In the presence of processing energycost, transmitting all the time as in the conventional no-cost case is nolonger optimal. For a two-user Gaussian interference channel with processingenergy cost, assuming that the on-off states of transmitters are not utilizedfor signaling, several transmission schemes with varying complexities areproposed and their sum rates are compared with an interference-free upperbound. Moreover, the very strong interference regime, under which interferencedoes not incur any rate penalty, is identified and shown to be larger than thecase of no processing energy cost for certain scenarios of interest. Also,extensions to a three-user cascade Gaussian Z interference channel withprocessing energy cost are provided, where scheduling of user transmissionsbased on the channel set-up is investigated.

Transmission Schemes for Gaussian Interference Channels with Transmitter Processing Energy