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Multiple Access Communications: 5th International Workshop, by Surat Teerapittayanon, Kerim Fouli, Muriel Médard,

By Surat Teerapittayanon, Kerim Fouli, Muriel Médard, Marie-José Montpetit, Xiaomeng Shi (auth.), Boris Bellalta, Alexey Vinel, Magnus Jonsson, Jaume Barcelo, Roman Maslennikov, Periklis Chatzimisios, David Malone (eds.)

This publication constitutes the refereed complaints of the fifth overseas Workshop on a number of entry Communications, MACOM 2012, held in Maynooth, eire, in November 2012. The thirteen complete papers and five demo and poster papers offered have been rigorously reviewed and chosen from numerous submissions. The papers are prepared in topical sections on community coding, dealing with interference and localization strategies at PHY/MAC layers, instant entry networks, and medium entry control.

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Additional resources for Multiple Access Communications: 5th International Workshop, MACOM 2012, Maynooth, Ireland, November 19-20, 2012. Proceedings

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Pk : probability of k arrivals in an interval [t, t + N2 T [, or pk = P Nt+ N T,i→j − Nt,i→j = k , 2 (4) where i = j. Our assumptions on incoming traffic ensure that pk is independent from t, i, and j. Under Poisson arrivals, pk is given by N pk = e−λ 2 T (λ N2 T )k , k! (5) where λ is the packet arrival rate into any queue Qi→j in our configuration. – Xt,i→j : number of packets in Qi→j at time t. 30 K. Fouli et al. – tk (i → j): the instant preceding the k th visit of the NC server to Qi→j . Assuming that Q1→2 is processed at time t = 0, and that the server follows the procedure of Alg.

Sk,i→j = 0), its next state Sk+1,i→j will be the number of new packet arrivals (Ak+1,i→j ). Otherwise, it will be the sum of previous state and arrivals, minus one served packet. In other words, for any queue Qi→j , the series (Sk,i→j ) satisfies Sk+1,i→j = f (Sk,i→j , Ak+1,i→j ) (16) s+a if s = 0, s + a − 1 otherwise, (17) where f (s, a) = and Ak+1,i→j is independent from Sk,i→j for any k. It follows that the series (Sk,i→j ) is a Markov chain with a transition matrix A given by ⎞ ⎛ p0 p1 p2 p3 .

Noncoherent DHA FH OFDMA with threshold reception seems the most promising one since it is much less vulnerable to multitone jamming than the conventional FH OFDMA. However, it was shown in [2] that in classical DHA FH OFDMA using q-ary FSK modulation the probability of erasure grows drastically as q grows. Thus in a classical DHA FH OFDMA system the value of q is to be relatively small and therefore the data transmission rate in such a system is bound to be relatively low too. In [3] a modification of a classical DHA FH OFDMA model has been proposed: a coded DHA FH OFDMA model.

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