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While operators have started deploying fourth generation (4G) wireless communication systems, which could provide up to 1Gbps downlink peak data rate, the improved system capacity is still insufficient to meet the drastically increasing demand of mobile users over the next decade. The main causes of the above-mentioned phenomenon include the following two aspects: 1) the growth rate of the network...
Cognitive radio (CR) is regarded as a promising technology for providing a high spectral efficiency to mobile users by using heterogeneous wireless network architectures and dynamic spectrum access techniques. However, cognitive radio networks (CRNs) may also impose some challenges due to the ever increasing complexity of network architecture, the increasing complexity with configuration and management...
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