Read e-book online Cognitive Wireless Networks: Concepts, Methodologies and PDF

By Frank H. P. Fitzek, Marcos D. Katz

ISBN-10: 1402059787

ISBN-13: 9781402059780

ISBN-10: 1402059795

ISBN-13: 9781402059797

This ebook advocates the belief of breaking apart the mobile verbal exchange structure through introducing cooperative thoughts between instant units via cognitive instant networking. It information the cooperative and cognitive features for destiny instant communique networks. insurance comprises social and organic encouraged habit utilized to instant networks, peer-to-peer networking, cooperative networks, and spectrum sensing and administration.

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Additional resources for Cognitive Wireless Networks: Concepts, Methodologies and Visions: Inspiring the Age of Enlightenment of Wireless Communications

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Spreading Out Source, Destination and Information Flow In general it is often assumed that in a communication system the information to be transmitted is originated in a point (or single) source and the destination is also punctual. An extension to this basic point–to–point communication paradigm is the point–to–multipoint model, as in for instance information distributing systems, typically broadcast and multicast delivery techniques. In interacting wireless systems such as cooperative clusters the information targeting the destination may also end up in, or could be deliberately directed to other, originally non-intended nodes, which, under certain conditions, may become actively interested in the content, with a clear benefit for all collaborating members.

But, why are cooperative techniques receiving increasing attention in the field of wireless communications? The answer is clear: cooperation has the potential to improve the most important link and network performance figures, including achievable data throughput, quality of service, network capacity and coverage. In addition, cooperation can in principle enhance the efficiency in the utilization of radio resources, a highly sought capability for spectrum-, power- and energy–limited systems. Furthermore, cooperation can be used in order to share and augment the capabilities of the interacting wireless devices, creating virtual devices with scalable architecture and enhanced features.

The processing station or device in the case of AF is usually denominated repeater. In the DF approach the signal is received and digitally regenerated before being transmitted forward, thus the noise is not amplified over the multi-hop chain as with the AF method. The processing node in this case is refereed to as the relay. Many other relaying (repeating) schemes exist such as estimate-and-forward, storeand-forward and hybrid combinations of them. In general, a two-hop solution (single repeater) is a good engineering compromise in cellular networks, while in distributed networks a generic multi-hop approach is usually considered.

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Cognitive Wireless Networks: Concepts, Methodologies and Visions: Inspiring the Age of Enlightenment of Wireless Communications by Frank H. P. Fitzek, Marcos D. Katz


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