System and method for the transmission of an audio or speech signal
AssigneeThales
InventorsPierre André Laurent, Cédric Demeure
Life of this patent
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Abstract
A system and method for transmitting an analog signal. The analog signal is converted into complex numbers such that two successive audio samples respectively form a real part and an imaginary part of a respective complex number. The complex numbers are then dispersed in a time-frequency space. The complex numbers are then modulated through a digital modulator into temporal signals and the temporal signals are output for transmission. Thereby, a digital modulator conventionally used for modulating digital input signals can operate for the transmission of an analog signal.
Claims18
A method for transmitting an analog signal comprising:
- inputting said analog signal;
- sampling said analog signal at a predetermined frequency to generate a sampled analog signal;
- converting the sampled analog signal into complex numbers such that two successive samples of said sampled analog signal respectively form a real part and imaginary part of a respective complex number;
- dispersing the complex numbers in a time-frequency space;
- and
- modulating the dispersed complex numbers through a digital modulator into temporal signals and outputting the temporal signals for transmission.
A device for transmitting an analog signal comprising:
- an input receiving said analog signal;
- a sampling module configured to sample said analog signal at a predetermined frequency to generate a sampled analog signal;
- a converting module configured to convert the sampled analog signal into complex numbers such that two successive samples of said sampled analog signal respectively form a real part and imaginary part of a respective complex number;
- an interleaving module configured to disperse the complex numbers in a time-frequency space;
- and
- a digital modulator configured to modulate the dispersed complex numbers into temporal signals and to output the temporal signals for transmission.
A device for transmitting an analog signal comprising:
- means for inputting said analog signal;
- means for sampling said analog signal at a predetermined frequency to generate a sampled analog signal;
- means for converting the sampled analog signal into complex numbers such that two successive samples of said sampled analog signal respectively form a real part and imaginary part of a respective complex number;
- means for dispersing the complex numbers in a time-frequency space;
- and
- means for modulating the dispersed complex numbers through a digital modulator into temporal signals and outputting the temporal signals for transmission.
Dependencies are inferred from the claim text.