Telecommunications – Transmitter and receiver at separate stations – Frequency or phase modulation
Reexamination Certificate
2006-02-07
2006-02-07
Hong, Harry S. (Department: 2642)
Telecommunications
Transmitter and receiver at separate stations
Frequency or phase modulation
C370S204000, C370S205000, C375S259000, C375S271000, C375S322000, C455S067140, C455S067160
Reexamination Certificate
active
06996371
ABSTRACT:
The invention relates to a device for aiding the analysis of signals by using symbols-based digital modulation. The device includes a signal memory for storing a complex digital signal, representative in amplitude and phase of a captured signal, over a chosen duration, as well as a processor for searching for the properties relating to the carrier frequency of the complex signal and to its modulation. According to the invention, the processor includes a projector for calculating the components of the complex signal in a function basis, the function basis being parameterized according to an estimated tempo of the modulation, as well as a calculator, operating on these components so as to determine an estimate relating to a property of the complex signal, from among its elementary pulse shape, the string of symbols of the complex signal and its carrier.
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N. M. Marinovich†, et al., “Classification Of Digital Modulation Types”, Proceeding of the Spie, vol. 2563, Jul. 10, 1995, pp. 125-143.
K. C. Ho, et al., “Modulation Identification By The Wavelet Transform”, Milcom Conference Record, vol. 2, Nov. 6, 1995, pp. 886-890.
Peter A.J. Nagy, “Modulation Classification—An Unified View”, Signal Processing, Theories and Applications, Proceedings of Eusipco, vol. 2, 1996, pp. 831-834.
Couderette André
Delabbaye Jean-Yves
Hong Harry S.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Thales
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