Joint Power Allocation for Multi-Cell Distributed Antenna Systems With Large-Scale CSIT

Provided by: Tsihai
Topic: Mobility
Format: PDF
In this paper, the problem of joint Power Allocation (PA) for the downlink of a multi-cell Distributed Antenna System (DAS) is addressed. Motivated by practical applications, the authors focus on a reasonable scenario that only the large-scale Channel State Information at the Transmitter (CSIT) is available. Based on the observation that the capacity-achieving input covariance for each cell is diagonal and that PA optimization is enough to achieve the maximum ergodic sum capacity, they formulate a joint PA optimization problem to maximize the ergodic sum capacity of the system with a total transmit power constraint for each cell.

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