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Telecommunications and Radio Engineering
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ISSN Imprimer: 0040-2508
ISSN En ligne: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v77.i9.60
pages 817-830

ESTIMATION OF THE EFFICIENCY OF APPLICATION OF BAND SCRAMBLERS FOR VOICE INFORMATION PROTECTION IN THE NARROWBAND TELECOMMUNICATION SYSTEMS

V. D. Kukush
Kharkiv National University of Radio Engineering and Electronics, 14 Nauka Ave, Kharkiv, 61166, Ukraine
D. Yu. Verchik
Kharkiv National University of Radio Electronics, 14, Nauka Ave., Kharkiv, 61166, Ukraine

RÉSUMÉ

The advantages of using scramblers in the narrow-band voice communication systems are considered and a detailed analysis of strength to hacking of communication channels secured by frequency-domain scrambling technique is given. The effect of the number and order of permutation of the bands on the residual legibility of the scrambled signal is investigated. A description is also given of the developed algorithm for digital signal processing, which realizes the function of the band scrambler in the frequency domain and does not require synchronization between the scrambler and the descrambler.