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Optimum transmission ranges in a direct-sequence spread-spectrum multihop packet radio network

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2 Author(s)
Sousa, E.S. ; Dept. of Electr. Eng., Toronto Univ., Ont., Canada ; Silvester, J.A.

The authors obtain the optimum transmission ranges to maximize throughput for a direct-sequence spread-spectrum multihop packet radio network. In the analysis, they model the network self-interference as a random variable which is equal to the sum of the interference power of all other terminals plus background noise. The model is applicable to other spread-spectrum schemes where the interference of one user appears as a noise source with constant power spectral density to the other users. The network terminals are modeled as a random Poisson field of interference power emitters. The statistics of the interference power at a receiving terminal are obtained and shown to be the stable distributions of a parameter that is dependent on the propagation power loss law. The optimum transmission range in such a network is of the form CKα where C is a constant, K is a function of the processing gain, the background noise power spectral density, and the degree of error-correction coding used, and α is related to the power loss law. The results obtained can be used in heuristics to determine optimum routing strategies in multihop networks

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Selected Areas in Communications, IEEE Journal on  (Volume:8 ,  Issue: 5 )