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4,941
The secondary receiver applies
"... Abstract—In this paper, we investigate the problem of spectrally efficient operation of a cognitive radio, also called secondary spectrum user, under an interference from the primary system. A secondary receiver observes a multiple access channel of two users, the secondary and the primary transmitt ..."
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Abstract—In this paper, we investigate the problem of spectrally efficient operation of a cognitive radio, also called secondary spectrum user, under an interference from the primary system. A secondary receiver observes a multiple access channel of two users, the secondary and the primary
On Projection Algorithms for Solving Convex Feasibility Problems
, 1996
"... Due to their extraordinary utility and broad applicability in many areas of classical mathematics and modern physical sciences (most notably, computerized tomography), algorithms for solving convex feasibility problems continue to receive great attention. To unify, generalize, and review some of the ..."
Abstract
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Cited by 331 (43 self)
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Due to their extraordinary utility and broad applicability in many areas of classical mathematics and modern physical sciences (most notably, computerized tomography), algorithms for solving convex feasibility problems continue to receive great attention. To unify, generalize, and review some
Sensing-throughput tradeoff for cognitive radio networks
- in Proc. IEEE Int. Conf. Commun.(ICC
, 2006
"... Abstract—In a cognitive radio network, the secondary users are allowed to utilize the frequency bands of primary users when these bands are not currently being used. To support this spectrum reuse functionality, the secondary users are required to sense the radio frequency environment, and once the ..."
Abstract
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Cited by 291 (19 self)
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proposed in this paper. Computer simulations have shown that for a 6MHz channel, when the frame duration is 100ms, and the signal-to-noise ratio of primary user at the secondary receiver is −20dB, the optimal sensing time achieving the highest throughput while maintaining 90 % detection probability is 14
RECEIVED
, 1988
"... This paper develops a model of competitive bidding with a resale market. The primary market is modelled as a common-value auction, in which bidders participate for the purpose of resale. After the auction the winning bidders sell the objects in a secondary market and the buyers on the secondary mark ..."
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market receive information about the bids submitted in the auction. The effect of this information linkage between the primary auction and the secondary market on bidding behaviour in the primary auction is examined. The auctioneer's expected revenues from organizing the primary market as a
Secondary
"... College admission and academic advising in Ireland are considered, with background information about the Irish educational system and comparisons to the U.S. system provided. University students in Ireland do not have the benefits of a centralized professional advisement system, and there appear to ..."
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. An additional 2 or 3 years of coursework leads to the Leaving Certificate examination. Points on this examination are assigned for subjects tested, and the total points received by the student determine acceptance for third level education as well as the course of study to which the student will be assigned
Received
, 2008
"... ; accepted Aims. We report the discovery of five new dwarf novae that were spectroscopically identified in the Hamburg Quasar Survey (HQS), and discuss the properties of the sample of new dwarf novae from the HQS. Methods. Follow-up time-resolved spectroscopy and photometry have been obtained to cha ..."
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.317 ±0.001 min for HS1857+7127, and Porb = 258.02 ±0.56 min for HS2214+2845. HS1857+7127 is found to be partially eclipsing. In HS2214+2845 the secondary star of spectral type M3 ±1 is clearly detected, and we estimate the distance to the system to be d = 390 ± 40pc. We recorded one superoutburst of HS
Received
, 2014
"... The copyright line for this article was changed on 5 May 2015 after original online publication. Pubertal status is related to childhood growth and inde-pendently associated with health outcomes such as lung function, blood pressure and mental health (1). However, self-assessment of pubertal status ..."
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the attainment of secondary sex characteristics, as a proxy for pubertal status in this population, and to explore any ethnic differences in rates of pubertal attainment.
Received
, 2004
"... Objective: To assess the relation between demographic factors and film smoking stereotypes in adolescents and the potential influence of smoker stereotypes on smoking susceptibility. Design: A cross sectional questionnaire survey of school students (n = 3041) aged 12–13 and 16–17 years who were aske ..."
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asked to describe the personal characteristics of female and male smokers in films. Setting: 15 primary or intermediate schools and 10 secondary schools in Auckland, New Zealand. Results: Appraisals of smokers in film were strongly influenced by age and sex with younger adolescents and males more likely
Received
, 2010
"... DOI:10.1111/j.1651-2227.2010.02048.x Aim: To study academic performance (final grades at the age of 16 years) in individuals with i) attention-deficit ⁄hyperactivity disorder (ADHD) and ii) other learning and ⁄ or behavioural problems. Methods: Of a total population of 591 children, originally asses ..."
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. Results: The ADHD and BLP groups had a significantly lower total mean grade at the age of 16 years than the comparison group. In addition, the ADHD and BLP groups also qualified for further studies in the upper secondary school to a significantly lesser extent than the controls (72%, 68 % and 92
Some Fundamental Limits on Cognitive Radio
- in Forty-second Allerton Conference on Communication, Control, and Computing
, 2004
"... Cognitive radio refers to wireless architectures in which a communication system does not operate in a fixed assigned band, but rather searches and finds an appropriate band in which to operate. In this paper we explore, from first principles, the fundamental requirements for such system that tries ..."
Abstract
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Cited by 171 (15 self)
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to avoid interference to potential primary users of a band. We first show that in order to deliver real gains, cognitive radios must be able to detect undecodable signals. This is done by showing how to evaluate the tradeoff between secondary user power, available space for secondary operation
Results 1 - 10
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