104 search results - page 16 / 21 » Sensing-based opportunistic channel access |
INFOCOM
2012
IEEE
12 years 7 days ago
2012
IEEE
Abstract—Opportunistic wireless channel access by nonlicensed users has emerged as a promising solution for addressing the bandwidth scarcity challenge. Auctions represent a natu...
ICASSP
2009
IEEE
14 years 4 months ago
2009
IEEE
—Spectrum access is an important function of cognitive radios for detecting and utilizing spectrum holes without harming the legacy systems. In this paper, we propose novel coope...
ICC
2009
IEEE
14 years 4 months ago
2009
IEEE
Abstract— Relaying and orthogonal frequency division multiple access (OFDMA) are the accepted technologies for emerging wireless communications standards. The activities in many ...
IWCMC
2009
ACM
14 years 4 months ago
2009
ACM
In wireless communication systems, adaptive modulation and coding (AMC) is used to improve the downlink (DL) spectral efficiency by exploiting the underlying channel condition. Ho...
VTC
2008
IEEE
14 years 4 months ago
2008
IEEE
Abstract—This paper studies the performance of orthogonal frequency division multiple access – time division duplex (OFDMA-TDD) cellular networks when jointly applying dynamic ...