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Journal Radioengineering №3 for 2014 г.
Article in number:
Efficiency improving of radio-frequency spectrum using
Keywords: spectrum efficiency QAM- OFDM-signals Okumura-Hata fading models
Authors:
A. Y. Bekkiev - Dr. Sci. (Eng.), professor, the director general of JSC «Sozvezdie» Concern»
V. I. Borisov - Dr. Sci. (Eng.), professor, corresponding member of the Russian Academy of Sciences, the director of sciences of JSC «Sozvezdie» Concern»
A. E. Limarev - project director, JSC «Sozvezdie» Concern». E-mail: limarev@sozvezdie.su
S. Ju. Beleckaja - Dr. Sci. (Eng.), professor of "Voronezh State Technical University"
Abstract:
This work proposes an analysis of efficiency improvement for RF spectrum using, based on the efficiency criterion. It was shown, that this criterion can be written as the product of spectral efficiency per unit area (cell) at the time channel utilization index. In details were considered opportunities for spectral efficiency improvement at the channel level by means of signal constructions design based on orthogonal signal with high multistate modulation (in particular - N-OFDM/M-QAM). A comparison with the upper bound, given by Shennon-s equation, is also proposed. For the coverage area estimation of base station has been provided the usage of Okumura-Hata statistical models (COST231 et cetera). In the work were also completed the coverage area analysis for distance between base station and abonent station antenna and the same analysis for utilized frequency range.
Pages: 24-31
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