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Cognitive radio (CR) has been considered as a promising solution to tackle the spectrum scarcity problem by allowing spectrum sharing [1].
Another observation that can be made from Figure 5 is that when the primary system is interested in improving its QoS (e.g., at or at ), it can always request the help of ST to improve its QoS while at the same time allowing spectrum access by the secondary system.
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By the early 1950s heated inlet systems were allowing spectra of all kinds of volatile organic compounds to be obtained.
The 50-year-old building was in poor shape, but it was the presence of asbestos that allowed Spectrum to qualify for the critical first piece of financing: a $2 million brownfield redevelopment grant from the federal Department of Housing and Urban Development.
One possible way to efficiently utilize the radio spectrum is to allow spectrum sharing between various wireless systems[2 6].
The equilibrium maximizes the total utility of the network and allows spectrum sharing between primary and secondary cognitive users.
CRN, first introduced in [4, 5], is a new paradigm for wireless communication that allows spectrum deficiency to be exploited in an opportunistic manner.
Both theoretical and experimental results demonstrate that a relay-assisted cognitive spectrum sharing protocol [16, 18] is able to assist the primary system to achieve a better performance and at the same time allows spectrum access for the secondary system.
Such problem formulation allows spectrum agile node to achieve the optimal tradeoff between determination of interference patterns in each channel and use of channel that is optimal so far.
From a specification of the allowed spectrum, for instance prescribed by a standard, including a PSD-mask and a number of tones, we analytically predict achievable PAR levels, and thus implicitly suggest parameter choices.
In future versions of Spectrum, we intend to automate the process of finding the incidence curve that allows Spectrum to best fit to program data.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com