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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

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.

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What is claimed is: 1. 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 sai

What is claimed is: 1. 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. 2. A method according to claim 1, further comprising: pre-processing the sampled analog signal prior to the converting. 3. A method according to claim 2, wherein the pre-processing comprises at least one of pre-accentuation, linear distribution, or dynamic compression of the sampled analog signal. 4. A method according to claim 2, further comprising: filtering the input analog signal prior to the sampling. 5. A method according to claim 1, wherein the digital modulator outputs the complex numbers associated with respective of N independently modulated time-frequency cells used to transmit the temporal signals. 6. A method according to claim 1, wherein the digital modulator is one of an OFDM (Orthogonal Frequency Division Multiplexing) or COFDM (Coherent Orthogonal Frequency Division Multiplexing) modem. 7. A method according to claim 1, wherein the digital modulator comprises a single-carrier modem. 8. A method according to claim 1, wherein the input analog signal is an audio or speech signal. 9. 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. 10. A device according to claim 9, further comprising: a pre-processor configured to pre-process the sampled analog signal prior to the conversion. 11. A device according to claim 10, wherein the pre-processor performs at least one of pre-accentuation, linear distortion, or dynamic compression of the sampled analog signal. 12. A device according to claim 10, further comprising: a filter configured to filter the input analog system prior to the sampling. 13. A device according to claim 9, wherein the digital modulator outputs the complex numbers associated with respective of N independently modulated time-frequency cells used to transmit the temporal signals. 14. A device according to claim 9, wherein the digital modulator is one of an OFDM (Orthogonal Frequency Division Multiplexing) or COFDM (Coherent Orthogonal Frequency Division Multiplexing) modem. 15. A device according to claim 9, wherein the digital modulator comprises a single-carrier modem. 16. A device according to claim 9, wherein the input analog signal is an audio or speech signal. 17. 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. 18. A device according to claim 17, further comprising: means for pre-processing the sampled signal prior to the converting.