Analysis of noise immunity of OFDMA communication systems operated in the presence of interfering stations |
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Authors: | A V Davydov A A Mal’tsev |
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Institution: | (1) N. I. Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia |
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Abstract: | We analyze noise immunity of high-speed data transmission systems operated in a complex communication channel with frequency-selective
fadings and interference from the neighboring base stations. This problem is very topical for modern orthogonal frequency-division
multiple-access (OFDMA) data transmission standards. Such digital communication systems allow one to measure the noise parameters
on individual subcarriers simultaneously with reception useful signals. We perform comparative analysis of different methods
for measuring the noise characteristics and using them for demodulating the coded signal. Four processing methods with different
complexity and noise immunity degree are proposed for receiver signals. Characteristics of the considered receivers are compared
for different channel loadings and algorithms of power control by interfering stations. Practical recommendations for using
the considered receivers are given.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 50, No. 6, pp. 533–543, June 2007. |
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Keywords: | |
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