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Zhi Chen,Pingyi Fan,Dapeng Oliver Wu,Khaled Ben Letaief 한국통신학회 2017 Journal of communications and networks Vol.19 No.6
In this work, a multiple-input multiple-output (MIMO)broadcast channel under the energy harvesting (EH) constraintand the peak power constraint is investigated. The transmitteris equipped with a hybrid energy storage system consisting of aperfect super capacitor (SC) and an inefficient battery, where bothelements are with limited energy storage capacities. In addition,the effect of data processing circuit power consumption is also addressed. To be specific, two extreme cases are studied here, wherethe first assumes ideal/zero circuit power consumption and the secondconsiders a positive constant circuit power consumption wherethe circuit is always operating at its highest power level. Theperformance of these two extreme cases hence serve as the upperbound and the lower bound of the system performance in practice,respectively. In this setting, the offline scheduling with idealand maximum circuit power consumption models are investigated. Their corresponding optimization problems are formulated andsolved in terms of weighted sum-throughput. Further, we extendto a general circuit power consumption model. To complement thiswork, some intuitive online policies are presented for all cases. Interestingly,for the case with maximum circuit power consumption,a close-to-optimal online policy is presented and its performance isshown to be comparable to its offline counterpart in the numericalresults.
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