Method for demodulating a modulated signal, demodulator and...

Telecommunications – Receiver or analog modulated signal frequency converter – Frequency or phase modulation

Reexamination Certificate

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C455S042000

Reexamination Certificate

active

08078125

ABSTRACT:
A demodulator (6) for demodulating a modulated signal (3) comprises a Hubert transformer (7) for generating a Hubert transformed modulated signal (18) of the modulated signal (3). The Hubert transformed modulated signal (18) comprises modulated (5) and unmodulated signal sequences (4) and originates from an unmodulated signal. The demodulator (6) further comprises a comparing device (14) for comparing the Hubert transformed modulated signal (18) with a reference signal (15), which corresponds to the Hubert transformed unmodulated signal. The demodulator (6) is further configured to identify the modulated and unmodulated signal sequences (4, 5) based on the comparison.

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Taira, S. “On Automatic Classification of Analogue Modulation Signals and FSK Signals”, Second Research Center, Technical Research and Development Institute, Japan Defense Agency, The Institute of Electronics, Information and Communication Engineers (IEICE), Technical Report of IEICE, vol. 98, No. 404, 9 pgs. (Nov. 19, 1998) (English Abstract Included).

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