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In this paper, multi-user relay networks are considered. We formulate a multi-user relay network model where all the relay nodes amplify and forward the signals from the source nodes to the destination nodes. Then we define the metric of energy efficiency and prove the quasi-concavity of the expression for energy efficiency. Moreover, a bisection method is raised to solve the problems. Three schemes...
The non-orthogonality among basic midamble sequences causes inter-cell interference to the channel estimation in TD-SCDMA downlink receiver at UEs. To mitigate this kind of interference, per-chip interference cancellation methods are conventionally adopted, which however suffer from high complexity. In this paper, the strategy of per-path interference cancellation is proposed in the scenario of downlink...
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