Analog Scrambling by the General Fast Fourier Transform
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There are many different methods in use to scrample voice signals. Two of them seem to be of special importance: band-splitting and time-division. In existing devices for scrambling analog signals often only on of these methods is implemented. However, newer equipment, which is realized by digital circuitry, allow us to use both methods, band splitting and time division, at the same time.
KeywordsVoice Signal Nonabelian Group Digital Circuitry Arbitrary Abelian Group Fast Realization
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