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When a cognitive radio network shares the spectrum with a primary network, the harmful interference to the primary users is one of the most important concerns. In this paper, we propose a new cognitive scheme which has two cognitive sub-networks sharing the same relay station, considering the interference to the primary user. We study the Weighted Rate Balance problem with the constraint of the transmit...
Relaying has been proposed as an efficient technique to extend coverage and improve throughput in future wireless networks. However, its performance gain is degraded in the presence of co-channel interference, which is intensified as the network density keeps increasing. In this letter, we investigate interference management in a two-hop interference channel with decode-and-forward relaying. To efficiently...
The paper considers the multiple-access two-hop relay network, due to more practical environment, the source nodes only know the statistical channel state information. We adopt a general jointly-correlated MIMO channel model, which does not require separable spatial correlations at the source nodes and relay node. Based on this model, we firstly derive the closed-form tight upper bound for the ergodic...
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