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This paper discusses transmission performance and power allocation strategies in an underlay cognitive radio (CR) network that contains relay and massive multi-input multi-output (MIMO). The downlink transmission performance of a relay-aided massive MIMO network without CR is derived. By using the power distribution criteria, the kth user’s asymptotic signal to interference and noise ratio (SINR)...
This paper investigates the joint use of full-duplex relay (FDR) and Device-to-Device (D2D) communication in cognitive wireless networks (CWNs). FDR not only increases the time-frequency efficiency by the time-frequency reuse compared to half-duplex relay (HDR), but also expands the network coverage by the use of the relay. In addition, D2D can enhance the wireless resource efficiency and achieve...
In cognitive radio networks, wideband spectrum sensing is a key requirement for cognitive radio access. Different node allocation schemes will lead to the different sensing performance between the sub-bands that compose the wideband. If the detection accuracy of some sub-band is much low, the primary user (PU) will be interfered severely. Thus, the system fairness which is measured by the minimum...
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