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This paper focuses on a network of renewable-energy-powered base stations where energy can be transferred across the network through power lines or wireless transfer. Specifically, we study a two-cell system with different numbers of cell users, and determine the direction and quantum of energy to transfer to maximize the sum-rate over all users when the energy transfer efficiency is η ∈ [0, 1]. We...
A novel linear precoding technique for the two user broadcast channel is presented. The performance measure used is the cross rate, defined as the difference between the sum throughputs of the system and its transpose. We show that the cross rate optimization problem can be reformulated as an alternating optimization of the steering matrix and power allocation. We solve the power allocation problem...
In this paper, a narrowband multiple-channel transmission scheme with multiple transmit antennas is proposed and analyzed. The channelization is based on space-time signature matrices, which do not expand bandwidth, unlike conventional schemes such as code-division or time-division multiplexing. The channels can be used by multiple independent users in an uplink or downlink scenario (multiple access...
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