METHOD AND DEVICE FOR RECEIVING A SIGNAL THE PHASE OR FREQUENCY OF WHICH IS MODULATED BY A SEQUENCE OF TWO-STATE SYMBOLS
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Abstract
A method allowing a receiver device of a wireless communication system to receive a useful signal emitted by an emitter device. The useful signal corresponding to a signal, the phase or frequency of which is modulated by a sequence of two-state symbols corresponding to a sequence of binary data. A temporal envelope of the useful signal is detected and compared to a preset threshold value. Transitions between consecutive useful-signal symbols are detected, on the basis of the result of the comparison. A sequence of binary data is extracted from the useful signal depending on the detected transitions.
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Citations
24 Claims
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1-10. -10. (canceled)
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11. A method for receiving, by a receiver device of a wireless communication system, of a useful signal transmitted by a transmitter device, the useful signal corresponding to a signal that is phase-modulated or frequency-modulated by a sequence of two-state symbols corresponding to a binary data sequence, the method comprising steps of:
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detecting a time-domain envelope of the useful signal; comparing the detected time-domain envelope with a predetermined threshold value; detecting transitions between consecutive symbols of the useful signal, a transition between two consecutive symbols, respective states of which are different, being detected when the detected time-domain envelope is less than the predetermined threshold value, and a transition between two consecutive symbols, the respective states of which are identical, being detected when the detected time-domain envelope is greater than the predetermined threshold value; and extracting the binary data sequence from the useful signal as a function of detected transitions between different states and as a function of detected transitions between identical states. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A receiver device of a wireless communication system to receive a useful signal transmitted by a transmitter device, the useful signal corresponding to a signal that is phase-modulated or frequency-modulated by a sequence of two-state symbols corresponding to a binary data sequence, the receiver device comprising a processing circuit configured to:
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detect a time-domain envelope of the useful signal; compare the detected time-domain envelope with a predetermined threshold value; detect transitions between consecutive symbols of the useful signal, a transition between two consecutive symbols, respective states of which are different, is detected when the detected time-domain envelope is less than the predetermined threshold value, and a transition between two consecutive symbols, the respective states of which are identical, is detected when the detected time-domain envelope is greater than the predetermined threshold value; and extract the binary data sequence from the useful signal as a function of detected transitions between different states and as a function of detected transitions between identical states. - View Dependent Claims (22, 23, 24)
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Specification