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Rapport (Rapport De Recherche) Année : 2008

Directionally Convex Ordering of Random Measures, Shot Noise Fields and Some Applications to Wireless Communications

Résumé

Directionally convex ($dcx$) ordering is a tool for comparison of dependence structure of random vectors that also takes into account the variability of the marginal distributions. When extended to random fields it oncerns comparison of all finite dimensional distributions. Viewing locally finite measures as non-negative fields of measure-values indexed by the bounded Borel subsets of the space, in this paper we formulate and study the $dcx$ ordering of random measures on locally compact spaces. We show that the $dcx$ order is preserved under some of the natural operations considered on random measures and point processes, such as independent superposition and thinning. Further operations such as independent marking and displacement, though do not preserve the $dcx$ order on all point processes, are shown to preserve the order on Cox point processes. We also examine the impact of $dcx$ order on the second moment properties, in particular on clustering and on Palm distributions. Comparisons of Ripley's functions, pair correlation functions as well as examples seem to indicate that p.p. higher in $dcx$ order cluster more. As the main result, we show that non-negative integral (shot-noise) fields with respect to $dcx$ ordered random measures inherit this ordering from the measures. Numerous applications of this result are shown, in particular to comparison of various Cox processes and some performance measures of wireless networks, in both of which shot-noise fields appear as key ingredients. We also mention a few pertinent open questions.
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Dates et versions

inria-00288866 , version 1 (19-06-2008)
inria-00288866 , version 2 (02-04-2009)

Identifiants

  • HAL Id : inria-00288866 , version 1
  • ARXIV : 0806.3180

Citer

Bartlomiej Blaszczyszyn, D. Yogeshwaran. Directionally Convex Ordering of Random Measures, Shot Noise Fields and Some Applications to Wireless Communications. [Research Report] 2008. ⟨inria-00288866v1⟩
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