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The joint source and relay power allocation (PA) problem of MIMO relay systems is studied in this paper. First, a joint PA cost function is formulated based on the maximization of the capacity. It is then shown that the cost function is only partially convex, i.e., it is convex with respect to only either the power allocation parameters in the source or those in the relay alone, making it very difficult...
In this paper, three cooperative relaying schemes are proposed for relay networks comprised of two source terminals and multiple relays, each with single antenna. The new relaying schemes, corresponding to the maximum ratio combining of the downlink and uplink channels, phase rotation of the received signals at relays, and the channel gain equalization, are designed based on the maximization of the...
This paper addresses the joint power allocation issue in physical-layer network coding (PLNC) of multicast systems with two sources and two destinations communicating via a large number of distributed relays. By maximizing the achievable system rate, a constrained optimization problem is first formulated to jointly allocate powers for the source and relay terminals. Due to the nonconvex nature of...
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