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数字通信基础与应用答案

Digital Communications - Foundations and Applications

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5.21MB

2019-06-28 00:21

Principles of mobile communication second edition

PrinciplesofmobilecommunicationsecondeditionbyGordonL.Stüber蓝色封皮的,上面印着蜂窝model

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15.9MB

2019-06-22 17:50

UML中文教程设计核心技术

UML中文教程时代新潮流UMLProgrammingGuide设计核心技术北京希望电脑公司

RAR

5.98MB

2019-05-14 22:43

NeXt generation dynamic spectrum access cognitive radio wireless networks

authors: Ian F. Akyildiz, Won-Yeol Lee, Mehmet C. Vuran *, Shantidev Mohanty Abstract Today’s wireless networks are characterized by a fixed spectrum assignment policy. However, a large portion of the assigned spectrum is used sporadically and geographical variations in the utilization of assigned spectrum ranges from 15% to 85% with a high variance in time. The limited available spectrum and the inefficiency in the spectrum usage necessitate a new communication paradigm to exploit the existing wireless spectrum opportunistical ly. This new networking paradigm is referred to as NeXt Generation (xG) Networks as well as Dynamic Spectrum Access (DSA) and cognitive radio networks. The term xG networks is used throughout the paper. The novel functionalities and current research challenges of the xG networks are explained in detail. More specifically, a brief overview of the cognitive radio technology is provided and the xG network architecture is introduced. Moreover, the xG network functions such as spectrum management, spectrum mobility and spectrum sharing are explained in detail. The influence of these functions on the performance of the upper layer protocols such as routing and transport are investigated and open research issues in these areas are also outlined. Finally, the cross-layer design challenges in xG networks are discussed. 2006 Elsevier B.V. All rights reserved.

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1.06MB

2018-12-20 17:08

WIRELESS COMMUNICATIONS

WIRELESS COMMUNICATIONS 斯坦福大学经典教材 教授Andrea Goldsmith 著 英文版,谁有中文版给我传一份吧

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2.34MB

2018-12-08 23:25

数字信号处理原理算法与应用

Digital signal processing principles, algorithms, and applications John G.Proakis Dimitris G.Manolakis

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19.08MB

2018-12-08 05:29