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Energy harvesting underlay device-to-device (D2D) networks are a promising solution to increase spectral and energy efficiency of wireless systems. However, to what extent is the performance of such networks affected by spatial randomness, temporal correlations, power control procedures, and channel uncertainties? To answer this question, we consider an environment with a multi channel primary user...
Millimeter wave communication is a promising concept for the fifth generation (5G) of cellular wireless networks due to the large available bandwidth while device to device (D2D) communication among nearby devices which saves network resources is also gaining attention. As such, D2D networks underlaying millimeter wave cellular systems hold massive potential. However, the performance of such a D2D...
Spectrum and energy constraints are fundamental barriers to the future growth of wireless communication networks, and to break this gridlock is the promise of energy harvesting cognitive radio (CR) networks. To this end, this paper investigates the feasibility of energy harvesting underlay CR networks with the primary system employing power control. We consider primary and underlay nodes distributed...
While massive MIMO based underlay cognitive radio (CR) networks are a promising concept in the next generation of wireless networks to increase spectral efficiency, reusing the same pilot sequences in both networks cause pilot contamination leading to residual interference. Thus, this paper investigates the affects of pilot contamination on a random CR network underlaid upon a random primary network...
In an underlay cognitive radio network, the secondary (underlay) transmitters generate interference to a primary receiver, while an underlay receiver is subject to interference from both the primary transmitters and other underlay transmitters not associated with it. Although guard regions, maximum allowable underlay transmit powers, and contention distances help guarantee a minimum performance to...
This paper investigates the effects of different cooperative sensing strategies on erroneous spectrum sensing for an interweave cognitive radio network. The setup is as follows. Primary receiver nodes and secondary nodes are randomly distributed in R^2. We model them as two independent homogeneous Poisson point processes. Beacon (out-of-band) signals, periodically transmitted by primary receivers,...
This paper investigates the aggregate interference from interweave cognitive secondary nodes spatially distributed in a finite Poisson field. These secondary nodes sense an out-of-band beacon to initiate their transmissions, which can be concurrent with those of the primary system if a sensing error is made. The resulting aggregate interference is analyzed in this paper. For this purpose, general...
Erroneous beacon detection by interweave secondary nodes generates interference on the primary system. This paper analyzes how the aggregate interference behaves when secondary nodes use transmit power control and receiver association schemes. For this purpose, secondary transmitter nodes and receiver nodes are assumed to be distributed over a circular region and over the entire 2-D plane respectively...
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