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Optimum transmission ranges in multihop packet radio networks in the presence of fading

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2 Author(s)
Zorzi, M. ; Dipartimento di Elettronica e Informazione, Politecnico di Milano, Italy ; Pupolin, S.

The evaluation of optimum transmission ranges in a packet radio network in a fading and shadowing environment is considered. It is shown that the optimal probability of transmission of each user is independent of the system model and is po≃0.271. The optimum range should be chosen so that on the average there are χ(G/b)2η/ terminals closer to the transmitter than the receiver, where G is the spread spectrum processing gain, b is the outage signal-to-noise ratio threshold, η is the power loss factor and χ depends on the system parameters and the propagation model. The performance index is given in terms of the optimal normalized expected progress per slot, given by ϑ(G/b)1η/ where ϑ is proportional to the square root of χ. A comparison with the results obtained by using deterministic propagation models shows, for typical values of fading and shadowing parameters, a reduction up to 40% of the performance index

Published in:

Communications, IEEE Transactions on  (Volume:43 ,  Issue: 7 )

Date of Publication:

Jul 1995

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