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INFOCOM
2011
IEEE
7 years 11 months ago
To preempt or not: Tackling bid and time-based cheating in online spectrum auctions
—Online spectrum auctions offer ample flexibility for bidders to request and obtain spectrum on-the-fly. Such flexibility, however, opens up new vulnerabilities to bidder mani...
Lara B. Deek, Xia Zhou, Kevin C. Almeroth, Haitao ...
ICASSP
2011
IEEE
7 years 11 months ago
Coding of unquantized spectrum sub-bands in superwideband audio codecs
We present several new methods for coding of spectrum coefficients in embedded audio codecs. In audio codecs, the spectrum is often divided in sub-bands, and quantized using a vec...
Vaclav Eksler, Milan Jelinek
ICASSP
2011
IEEE
7 years 11 months ago
Cooperative spectrum sensing based on matrix rank minimization
In cognitive radio (CR) networks, multi-CR cooperation typically takes place during spectrum sensing, to cope with wireless fading effects and the hidden terminal problem. The use...
Yue Wang, Zhi Tian, Chunyan Feng
TWC
2010
8 years 1 months ago
Outage Probability Analysis of Cognitive Transmissions: Impact of Spectrum Sensing Overhead
In cognitive radio networks, a cognitive source node requires two essential phases to complete a cognitive transmission process: the phase of spectrum sensing with a certain time d...
YuLong Zou, Yu-Dong Yao, Baoyu Zheng
EJWCN
2010
141views more  EJWCN 2010»
8 years 2 months ago
Scheduling Heterogeneous Wireless Systems for Efficient Spectrum Access
The spectrum scarcity problem emerged in recent years, due to unbalanced utilization of RF (radio frequency) bands in the current state of wireless spectrum allocations. Spectrum a...
Lichun Bao, Shenghui Liao
TWC
2011
320views more  TWC 2011»
8 years 2 months ago
Cognitive Transmissions with Multiple Relays in Cognitive Radio Networks
In cognitive radio networks, each cognitive transmission process typically requires two phases: the spectrum sensing phase and data transmission phase. In this paper, we investiga...
YuLong Zou, Yu-Dong Yao, Baoyu Zheng
JSAC
2011
191views more  JSAC 2011»
8 years 2 months ago
CRP: A Routing Protocol for Cognitive Radio Ad Hoc Networks
Abstract—Cognitive radio (CR) technology enables the opportunistic use of the vacant licensed frequency bands, thereby improving the spectrum utilization. However, the CR operati...
Kaushik R. Chowdhury, Ian F. Akyildiz
JSAC
2011
215views more  JSAC 2011»
8 years 2 months ago
Opportunistic Spectrum Sharing Schemes for CDMA-Based Uplink MAC in Cognitive Radio Networks
—We consider a wireless cognitive radio network in which a set of secondary users (SUs) opportunistically utilize the wireless spectrum licensed to the primary users (PUs) to tra...
Xi Zhang, Hang Su
JSAC
2011
159views more  JSAC 2011»
8 years 2 months ago
An Anti-Jamming Stochastic Game for Cognitive Radio Networks
—Various spectrum management schemes have been proposed in recent years to improve the spectrum utilization in cognitive radio networks. However, few of them have considered the ...
Beibei Wang, Yongle Wu, K. J. Ray Liu, T. Charles ...
JSAC
2011
137views more  JSAC 2011»
8 years 2 months ago
Cognitive Network Interference
—Opportunistic spectrum access creates the opening of under-utilized portions of the licensed spectrum for reuse, provided that the transmissions of secondary radios do not cause...
Alberto Rabbachin, Tony Q. S. Quek, Hyundong Shin,...
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