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101
Simultaneous information and energy transfer in largescale networks with/without relaying
 IEEE Trans. Commun
, 2014
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The Outage Probability of a Finite Ad Hoc Network in Nakagami Fading
"... Abstract—An ad hoc network with a finite spatial extent and number of nodes or mobiles is analyzed. The mobile locations may be drawn from any spatial distribution, and interferenceavoidance protocols or protection against physical collisions among the mobiles may be modeled by placing an exclusion ..."
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Cited by 17 (13 self)
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Abstract—An ad hoc network with a finite spatial extent and number of nodes or mobiles is analyzed. The mobile locations may be drawn from any spatial distribution, and interferenceavoidance protocols or protection against physical collisions among the mobiles may be modeled by placing an exclusion zone around each radio. The channel model accounts for the path loss, Nakagami fading, and shadowing of each received signal. The Nakagami mparameter can vary among the mobiles, taking any positive value for each of the interference signals and any positive integer value for the desired signal. The analysis is governed by a new exact expression for the outage probability, defined to be the probability that the signaltointerferenceandnoise ratio (SINR) drops below a threshold, and is conditioned on the network geometry and shadowing factors, which have dynamics over much slower timescales than the fading. By averaging over many network and shadowing realizations, the average outage probability and transmission capacity are computed. Using the analysis, many aspects of the network performance are illuminated. For example, one can determine the influence of the choice of spreading factors, the effect of the receiver location within the finite network region, and the impact of both the fading parameters and the attenuation power laws. Index Terms—Ad hoc networks, transmission capacity, Nakagami fading, spread spectrum.
1 Interference analysis for highly directional 60 GHz mesh networks: the case for rethinking medium
, 2010
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Outage Probability in ArbitrarilyShaped Finite Wireless Networks
, 2013
"... This paper analyzes the outage performance in finite wireless networks. Unlike most prior works, which either assumed a specific network shape or considered a special location of the reference receiver, we propose two general frameworks for analytically computing the outage probability at any arbit ..."
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Cited by 12 (5 self)
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This paper analyzes the outage performance in finite wireless networks. Unlike most prior works, which either assumed a specific network shape or considered a special location of the reference receiver, we propose two general frameworks for analytically computing the outage probability at any arbitrary location of an arbitrarilyshaped finite wireless network: (i) a moment generating functionbased framework which is based on the numerical inversion of the Laplace transform of a cumulative distribution and (ii) a reference link power gainbased framework which exploits the distribution of the fading power gain between the reference transmitter and receiver. The outage probability is spatially averaged over both the fading distribution and the possible locations of the interferers. The boundary effects are accurately accounted for using the probability distribution function of the distance of a random node from the reference receiver. For the case of the node locations modeled by a Binomial point process and Nakagamim fading channel, we demonstrate the use of the proposed frameworks to evaluate the outage probability at any location inside either a disk or polygon region. The analysis illustrates the location dependent performance in finite wireless networks and highlights the importance of accurately modeling the boundary effects.
Effect of Spatial Interference Correlation on the Performance of Maximum Ratio Combining
 IEEE TRANS. WIRELESS COMMUN
, 2014
"... While the performance of maximum ratio combining (MRC) is well understood for a single isolated link, the same is not true in the presence of interference, which is typically correlated across antennas due to the common locations of interferers. For tractability, prior work focuses on the two extr ..."
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Cited by 11 (3 self)
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While the performance of maximum ratio combining (MRC) is well understood for a single isolated link, the same is not true in the presence of interference, which is typically correlated across antennas due to the common locations of interferers. For tractability, prior work focuses on the two extreme cases where the interference power across antennas is either assumed to be fully correlated or fully uncorrelated. In this paper, we address this shortcoming and characterize the performance of MRC in the presence of spatiallycorrelated interference across antennas. Modeling the interference field as a Poisson point process, we derive the exact distribution of the signaltointerference ratio (SIR) for the case of two receive antennas, and upper and lower bounds for the general case. Using these results, we study the diversity behavior of MRC and characterize the critical density of simultaneous transmissions for a given outage constraint. The exact SIR distribution is also useful in benchmarking simpler correlation models. We show that the fullcorrelation assumption is considerably pessimistic (up to 30 % higher outage probability for typical values) and the nocorrelation assumption is significantly optimistic compared to the true performance.
Distance distributions in regular polygons
 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
, 2013
"... This paper derives the exact cumulative density function of the distance between a randomly located node and any arbitrary reference point inside a regular Lsided polygon. Using this result, we obtain the closedform probability density function (PDF) of the Euclidean distance between any arbitrary ..."
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Cited by 9 (5 self)
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This paper derives the exact cumulative density function of the distance between a randomly located node and any arbitrary reference point inside a regular Lsided polygon. Using this result, we obtain the closedform probability density function (PDF) of the Euclidean distance between any arbitrary reference point and its nth neighbour node, when N nodes are uniformly and independently distributed inside a regular Lsided polygon. First, we exploit the rotational symmetry of the regular polygons and quantify the effect of polygon sides and vertices on the distance distributions. Then we propose an algorithm to determine the distance distributions given any arbitrary location of the reference point inside the polygon. For the special case when the arbitrary reference point is located at the center of the polygon, our framework reproduces the existing result in the literature.
Cooperative relaying in a Poisson field of interferers: A diversity order analysis
 in IEEE Int. Symposium on Inf. Theory (ISIT
, 2013
"... Abstract—This work analyzes the gains of cooperative relaying in interferencelimited networks, in which outages can be due to interference and fading. A stochastic model based on point process theory is used to capture the spatial randomness present in contemporary wireless networks. Using a modifi ..."
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Cited by 7 (3 self)
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Abstract—This work analyzes the gains of cooperative relaying in interferencelimited networks, in which outages can be due to interference and fading. A stochastic model based on point process theory is used to capture the spatial randomness present in contemporary wireless networks. Using a modification of the diversity order metric, the reliability gain of selection decodeandforward is studied for several cases. The main results are as follows: the achievable spatialcontention diversity order (SCDO) is equal to one irrespective of the type of channel which is due to the ineffectiveness of the relay in the MACphase (transmit diversity). In the BCphase (receive diversity), the SCDO depends on the amount of fading and spatial interference correlation. In the absence of fading, there is a hard transition between SCDO of either one or two, depending on the system parameters. Index Terms—Cooperative relaying, interference, point process theory, selection decodeandforward I.
A comprehensive framework for devicetodevice communications in cellular networks,” arXiv preprint arXiv:1305.4219
, 2013
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Efficiency of wireless networks under different hopping strategies
 IEEE Trans. Wireless Commun
, 2012
"... Abstract—In this work we investigate whether it is preferable to have a large number of short singlehop links or a small number of long singlehops in a multihop wireless network. We derive analytical expressions to compute the metric aggregate multihop information efficiency under different hopp ..."
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Cited by 5 (3 self)
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Abstract—In this work we investigate whether it is preferable to have a large number of short singlehop links or a small number of long singlehops in a multihop wireless network. We derive analytical expressions to compute the metric aggregate multihop information efficiency under different hopping strategies, and analyze the tradeoff involving robustness of singlehop links, interference and hopping strategy. Index Terms—Aggregate multihop information efficiency, ad hoc networks, stochastic geometry I.