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RESEARCH PRODUCT
Power allocation for two-cell two-user joint transmission
Tommy SvenssonThomas ErikssonCarmen BotellaJingya Lisubject
Computer scienceReal-time computingPower allocation02 engineering and technologyData_CODINGANDINFORMATIONTHEORYPrecodingPower budgetTelecomunicacióBase station0203 mechanical engineeringTelecommunications link0202 electrical engineering electronic engineering information engineeringElectrical and Electronic EngineeringComunicació i tecnologiabusiness.industryCommunication Systems020302 automobile design & engineering020206 networking & telecommunicationsTransmission systemTransmitter power outputComputer Science Applicationscoordinated multi-point (CoMP)Transmission (telecommunications)Modeling and SimulationSignal Processingimperfect synchronizationbusinessjoint transmissionComputer networkData transmissiondescription
In this paper, we develop a power allocation scheme for the downlink of a two-cell two-user joint transmission system. The objective is to maximize the sum rate under per-cell power constraints. We study a worst case scenario where the carrier phases between the two base stations are un-synchronized, so that joint transmission must be performed without precoding. The derived power allocation scheme is remarkably simple, i.e., each cell transmits with full power to only one user. Note that joint transmission is still possible, when two cells select the same user for data transmission. Moreover, we prove that, in this scenario, the joint transmission case happens with higher probability when the maximum transmit power is high, or the two users are in the overlapped cell-edge area.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-09-01 |