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TWC
2008
188views more  TWC 2008»
8 years 8 months ago
Joint power control and beamforming for cognitive radio networks
We consider a secondary usage of spectrum scenario where a secondary network coexists and/or shares the radio spectrum with a primary network to which the spectrum is licensed. The...
Habibul Islam, Ying-Chang Liang, Anh Tuan Hoang
JSAC
2007
117views more  JSAC 2007»
8 years 8 months ago
Spectrum sharing for unlicensed bands
We study a spectrum sharing problem in an unlicensed band where multiple systems coexist and interfere with each other. Due to asymmetries and selfish system behavior, unfair and...
Raul Etkin, Abhay Parekh, David Tse
JSAC
2007
105views more  JSAC 2007»
8 years 8 months ago
What and how much to gain by spectrum agility?
— Static spectrum allocation prohibits radio devices from using spectral bands designated for others. As a result, some bands are under-utilized while other bands are over-popula...
Chun-Ting Chou, Sai Shankar N., Hyoil Kim, Kang G....
JCM
2007
162views more  JCM 2007»
8 years 8 months ago
Opportunistic Spectrum Access in Fading Channels Through Collaborative Sensing
— Spectrum scarcity is becoming a major issue for service providers interested in either deploying new services or enhancing the capacity for existing applications. On the other ...
Amir Ghasemi, Elvino S. Sousa
TMC
2008
180views more  TMC 2008»
8 years 8 months ago
OS-MAC: An Efficient MAC Protocol for Spectrum-Agile Wireless Networks
Wireless networks and devices have rapidly been gaining popularity over their wired counterparts. This popularity, in turn, has been generating an explosive and ever-increasing dem...
Bechir Hamdaoui, Kang G. Shin
TASLP
2008
61views more  TASLP 2008»
8 years 8 months ago
Spectral Representations of Nonmodal Phonation
Abstract--Regions of nonmodal phonation, which exhibit deviations from uniform glottal-pulse periods and amplitudes, occur often in speech and convey information about linguistic c...
Nicolas Malyska, Thomas F. Quatieri
PR
2008
206views more  PR 2008»
8 years 8 months ago
A study of graph spectra for comparing graphs and trees
The spectrum of a graph has been widely used in graph theory to characterise the properties of a graph and extract information from its structure. It has also been employed as a g...
Richard C. Wilson, Ping Zhu
MONET
2006
139views more  MONET 2006»
8 years 8 months ago
Market Driven Dynamic Spectrum Allocation over Space and Time among Radio-Access Networks: DVB-T and B3G CDMA with Heterogeneous
The radio frequency spectrum is a naturally limited resource of extraordinary value, as the key to the provision of important communication and information services. Traditionally,...
Virgilio Rodriguez, Klaus Moessner, Rahim Tafazoll...
MONET
2006
107views more  MONET 2006»
8 years 8 months ago
Utilization and fairness in spectrum assignment for opportunistic spectrum access
The Open Spectrum approach to spectrum access can achieve near-optimal utilization by allowing devices to sense and utilize available spectrum opportunistically. However, a naive d...
Chunyi Peng, Haitao Zheng, Ben Y. Zhao
JSAC
2006
153views more  JSAC 2006»
8 years 8 months ago
Dynamic spectrum access in open spectrum wireless networks
One of the reasons for the limitation of bandwidth in current generation wireless networks is the spectrum policy of the Federal Communications Commission (FCC). But, with the spec...
Yiping Xing, Rajarathnam Chandramouli, Stefan Mang...
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