Exact(9)
Today's wireless networks are characterized by a fixed spectrum assignment policy.
Traditional sensor nodes in a WSN use a fixed spectrum assignment policy for data transmission, and the performance is limited due to restricted processing and communication power.
Today's wireless networks are regulated by a fixed spectrum assignment policy, that is, the spectrum is regulated by governmental agencies and is assigned to license holder or services on a long-term basis for larger geographical regions.
The cognitive radio ad-hoc networks (CRAHNs)[3] allows the CRs to form a dynamic network without using a CR base station and a fixed spectrum as shown in Figure1 (b).
In fact, the available optical spectrum in flexgrid network is divided into frequency slots of a fixed spectrum width and an optical connection can be allocated into the number of slots that better matches the actual bandwidth of the connection demand.
Assume for the moment that there is a fixed spectrum of female preferences, illustrated by the solid bell-shaped curves in Fig. 3.
Similar(51)
Based on the random samples, incorporating the a priori information of the fixed spectrum allocation, an improved block-sparse constraint with different block length is used to enforce locally block distribution and globally sparse distribution of the estimated spectrum.
In the constraint, the estimated spectrum vector is divided into sections with different length according to the a priori information about fixed spectrum allocation.
Fixed spectrum allocation is a traditional spectrum allocation methodology for wireless communication systems.
However, the traditional approach of fixed spectrum allocation to a licensed network leads to the spectrum underutilization.
In [42], Pandit et al. approached the problem of the fixed spectrum allocation policy from an economic point of view where they proposed a simulation model to improve the bandwidth allocation between the primary and secondary users of a CR network.
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