By Mark Weichold, Mounir Hamdi, Muhammad Zeeshan Shakir, Mohamed Abdallah, George K. Karagiannidis, Muhammad Ismail
This ebook constitutes the completely refereed post-conference complaints of the tenth foreign convention on Cognitive Radio orientated instant Networks, CROWNCOM 2015, held in Doha, Qatar, in April 2015.
The sixty six revised complete papers offered have been rigorously reviewed and chosen from one hundred ten submissions and canopy the evolution of cognitive radio know-how touching on 5G networks. The papers are clustered to issues on dynamic spectrum access/management, networking protocols for CR, modeling and conception, HW structure and implementations, subsequent iteration of cognitive networks, criteria and company types, and rising functions for cognitive networks.
Read Online or Download Cognitive Radio Oriented Wireless Networks: 10th International Conference, CROWNCOM 2015, Doha, Qatar, April 21-23, 2015, Revised Selected Papers PDF
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Extra resources for Cognitive Radio Oriented Wireless Networks: 10th International Conference, CROWNCOM 2015, Doha, Qatar, April 21-23, 2015, Revised Selected Papers
At the destination, a successive interference cancellation (SIC) is performed to estimate the secondary signal. We present the explicit expressions of the optimal PU and SU powers that maximize their achievable rates. In the numerical results, we show that our scheme provides cognitive rate gain even in absence of tolerated interference. In addition, we show that increasing the number of relays enhances the PU and SU rates at low power regime and/or when the relays power is suﬃciently high. Keywords: Underlay cognitive radio Amplify-and-forward multiple-relay 1 · MIMO space alignment · Introduction In order to cope with the continuous growth of wireless networks, new emerging systems need to oﬀer higher data rate and to overcome bandwidth shortage.
Afterwards, the two formulated problems are proven to be quasiconvex and, hence, can be solved eﬃciently using standard techniques. Finally, the numerical results reveal interesting insights about the optimal performance compared to the unconstrained PU delay baseline system studied earlier in the literature. References 1. : Cognitive Radio: An Integrated Agent Architecture for Software Deﬁned Radio. D. thesis, Royal Institute of Technology (KTH) (2000) 2. : Multimedia traﬃc transmission over cognitive radio networks using multiple description coding.
We also show that at low values of Ptot , increasing the number of relays enhances both PU and SU rates. e. the relays constraints are not active. That is, adding more relays will further amplify the 26 L. Sboui et al. PU and SU signals and give better performances. However, as Ptot increases, the performances start to stagnate at a certain ﬁxed levels due to the saturation of the relays. We also notice that this saturation level of the rates decrease when L increases. In fact, since all the relays constraints are active, the more relays are available, the more constraints we are applying to the PU and SU transmit power.