A New Spectral Correlation Approach to Spectrum Sensing for 802.22 WRAN System
IPC '07 Proceedings of the The 2007 International Conference on Intelligent Pervasive Computing
Design of optimal relay location in two-hop cellular systems
Wireless Networks
Dynamic Time Slot Partitioning for Multimedia Transmission in Two-Hop Cellular Networks
IEEE Transactions on Mobile Computing
The efficacy of path loss models for fixed rural wireless links
PAM'11 Proceedings of the 12th international conference on Passive and active measurement
Cognitive Radio Transmission Based on Direct Sequence MC-CDMA
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications - Part 1
Technical solutions for the 3G long-term evolution
IEEE Communications Magazine
IEEE Communications Magazine
A design of macro-micro CDMA cellular overlays in the existing big urban areas
IEEE Journal on Selected Areas in Communications
Integrated cellular and ad hoc relaying systems: iCAR
IEEE Journal on Selected Areas in Communications
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
Cognitive Radio and its Application for Next Generation Cellular and Wireless Networks
Cognitive Radio and its Application for Next Generation Cellular and Wireless Networks
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In recent years, the cellular spectrum has become very crowded due to the tremendous success of mobile communications. However, a large portion of the electromagnetic spectrum assigned to other services is used sporadically only. A first step towards cognitive radio can be implemented in LTE-advanced networks by sensing the available frequencies and exploiting the existing radio spectrum opportunistically in order to improve its utilization. In this paper, novel multi-hop multi-band intelligent (MMI) radio architecture is proposed for LTE-advanced cellular networks that would make use of a number of intelligent gateways in order to enable simultaneous usage of spectrum resources within the same cell. It relies on a multi-band network model with increasing number of channels which exponentially reduces the time required for resource allocation. Importantly, an analytical model has been proposed to describe the effects of fading on optimum position of gateway. This model was found to have a very close match with the simulation results, in the calculation of mean, standard deviation and the statistically carried out $$t$$ t tests. Further, the two-hop architecture provides a significant increase in the system capacity. With nine bands and 50 nodes in the network, the MMI based two-hop design provides up to 150 % higher than that offered by a single-hop cellular design and with up to 40 % higher than when a state-of-the-art two-hop routing technique is employed.