Data Transmissions Over A Voice Channel

• US 20150244500A1
• Filed: 02/23/2015
• Published: 08/27/2015
• Est. Priority Date: 02/21/2014
• Status: Active Grant

• Current Assignee: Sogics Corporation Limited
• Original Assignee: Sogics Corporation Limited
• Inventors: Chao, Chieh-Yuan, Muller, Arnaud David Nicolas
• Granted Patent: US 9,337,958 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0015 characterised by the adaptation strategy
• CPC Class Codes: H04L 1/0054 Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1867 Arrangements specially adapted for the transmitter end
• CPC Class Codes: H04L 27/0008 arrangements for allowing a transmitter or receiver to use more than one type of modulation negotiating modulation type for two-way transmission paths H04L5/1453
• CPC Class Codes: H04L 5/143 for modulated signals H04L5/1469 takes precedence

Abstract

A modem for communicating application data over a voice channel comprises an adaptive modulator, a mixer, and a vocoder. The adaptive modulator modulates application data as a function of a source application of the application data and feedback information of the voice channel. The modulated data is inputted to the mixer. The vocoder processes the mixed data for transmission through the voice channel.

Claims

1. A modem for communicating application data over a voice channel, comprising:

an adaptive modulator, wherein the adaptive modulator modulates application data as a function of a source application of the application data and feedback information;

a mixer, wherein the modulated application data is inputted to the mixer; and

a vocoder, wherein the vocoder processes the mixed data for transmission through the voice channel.

2. The modem of claim 1 wherein one or more modulation waveforms is determined as a function of the source application of the application data and the feedback information and wherein the determined one or more modulation waveforms are used to modulate the application data.

3. The modem of claim 2 further comprising an adaptive control interface (“

ACI”

), wherein the ACI operates the adaptive modulator and wherein the ACI determines the determined one or more modulation waveforms as a function of the source application and the feedback information.

4. The modem of claim 2 wherein the adaptive modulator applies a plurality of modulation waveforms to the application data to generate multiple modulated copies of the application data, and wherein the multiple modulated copies of the application data are processed by the vocoder for transmission over the voice channel.

5. The modem of claim 1 further comprising

a cyclic redundancy check (“

CRC”

) module;

a forward error correction (“

FEC”

) module; and

a scrambler,

wherein the application data is inputted to the CRC module,

wherein the output of the CRC module is inputted to the FEC module,

wherein the output of the FEC module is inputted to the scrambler,

wherein the output of the scrambler is inputted to the adaptive modulator, and

wherein the ACI operates the CRC module, FEC module, and the scrambler on the fly as

a function of the channel feedback information.

6. The modem of claim 1 further comprising:

a pattern recognition module, wherein the pattern recognition module receives a mixed-in signal and wherein the pattern recognition module separates voice data and received application data from the received mixed-in signal.

7. The modem of claim 6 wherein the mixed-in signal has headers before the voice data and the received application data and wherein the headers are used to identify data types.

8. The modem of claim 6 wherein the pattern recognition module identifies speech patterns in the mixed-in signal, wherein the portions of the mixed-in signal that are identified as the speech patterns are processed as the voice data, and wherein remaining portions of the mixed-in signal are processed as the received application data.

9. The modem of claim 6 further comprising:

a demodulator, wherein the demodulator demodulates the received application data;

a descrambler, wherein the descrambler descrambles the received application data;

a bit-based log-likelihood-ratio (“

LLR”

) estimator, wherein the bit-based LLR estimator estimates LLRs for bits of the descrambled application data;

a symbol LLR estimator, wherein the symbol LLR estimator estimates the LLRs for symbols of the descrambled application data;

a second scrambler, wherein the second scrambler scrambles the symbols of the descrambled application data;

a probabilistic sequence estimator module, wherein the probabilistic sequence estimator module selects a best generated result from the bit-based LLR estimator; and

an error detection module, wherein the error detection module applies error detection on the best generated result from the LLR estimator.

10. The modem of claim 1 wherein the application data is a portion of sensitive data, and wherein the remaining portion of the sensitive data is transported via a data communications network.

11. A modem for communicating application data over a voice channel, comprising:

an adaptive modulator, wherein the adaptive modulator modulates application data as a function of a source application of the application data and feedback information, wherein one or more modulation waveforms is determined as a function of the source application of the application data and the feedback information, and wherein the determined one or more modulation waveforms are used to modulate the application data;

an adaptive control interface (“

ACI”

), wherein the ACI operates the adaptive modulator and wherein the ACI determines the determined one or more modulation waveforms as a function of the source application and the feedback information;

a mixer, wherein the modulated application data is inputted to the mixer;

a vocoder, wherein the vocoder processes the mixed data for transmission through the voice channel;

a cyclic redundancy check (“

CRC”

) module;

a forward error correction (“

FEC”

) module; and

a scrambler,

wherein the application data is inputted to the CRC module,

wherein the output of the CRC module is inputted to the FEC module,

wherein the output of the FEC module is inputted to the scrambler,

wherein the output of the scrambler is inputted to the adaptive modulator, and

wherein the ACI operates the CRC module, FEC module, and the scrambler on the fly as a function of the channel feedback information.

12. The modem of claim 11 wherein the adaptive modulator applies a plurality of modulation waveforms to the application data to generate multiple modulated copies of the application data, and wherein the multiple modulated copies of the application data are processed by the vocoder for transmission over the voice channel.

13. The modem of claim 11 further comprising:

a pattern recognition module,

wherein the pattern recognition module receives a mixed-in signal,

wherein the pattern recognition module separates voice data and received application data from the received mixed-in signal,

wherein the mixed-in signal has headers before the voice data and the received application data,

wherein the headers are used to identify data types,

wherein the pattern recognition module identifies speech patterns in the mixed-in signal,

wherein the portions of the mixed-in signal that are identified as the speech patterns are processed as the voice data, and

wherein remaining portions of the mixed-in signal are processed as the received application data.

14. The modem of claim 11 further comprising:

a demodulator, wherein the demodulator demodulates the received application data;

a descrambler, wherein the descrambler descrambles the received application data;

a bit-based log-likelihood-ratio (“

LLR”

) estimator, wherein the bit-based LLR estimator estimates LLRs for bits of the descrambled application data;

a symbol LLR estimator, wherein the symbol LLR estimator estimates the LLRs for symbols of the descrambled application data;

a second scrambler, wherein the second scrambler scrambles the symbols of the descrambled application data;

a probabilistic sequence estimator module, wherein the probabilistic sequence estimator module selects a best generated result from the bit-based LLR estimator; and

an error detection module, wherein the error detection module applies error detection on the best generated result from the LLR estimator.

15. The modem of claim 11 wherein the application data is a portion of sensitive data, and wherein the remaining portion of the sensitive data is transported via a data communications network.

16. A modem for communicating application data over a voice channel, comprising:

an adaptive modulator, wherein the adaptive modulator modulates application data as a function of a source application of the application data and feedback information, wherein one or more modulation waveforms is determined as a function of the source application of the application data and the feedback information, and wherein the determined one or more modulation waveforms are used to modulate the application data;

an adaptive control interface (“

ACI”

), wherein the ACI operates the adaptive modulator and wherein the ACI determines the determined one or more modulation waveforms as a function of the source application and the feedback information;

a mixer, wherein the modulated application data is inputted to the mixer;

a vocoder, wherein the vocoder processes the mixed data for transmission through the voice channel;

a cyclic redundancy check (“

CRC”

) module;

a forward error correction (“

FEC”

) module;

a scrambler;

a pattern recognition module;

a demodulator;

a descrambler;

a bit-based log-likelihood-ratio (“

LLR”

) estimator;

a symbol LLR estimator;

a second scrambler;

a probabilistic sequence estimator module; and

an error detection module,

wherein the application data is inputted to the CRC module,

wherein the output of the CRC module is inputted to the FEC module,

wherein the output of the FEC module is inputted to the scrambler,

wherein the output of the scrambler is inputted to the adaptive modulator,

wherein the ACI operates the CRC module, FEC module, and the scrambler on the fly as

a function of the channel feedback information,

wherein the pattern recognition module receives a mixed-in signal,

wherein the pattern recognition module separates voice data and received application data from the received mixed-in signal,

wherein the mixed-in signal has headers before the voice data and the received application data,

wherein the headers are used to identify data types,

wherein the pattern recognition module identifies speech patterns in the mixed-in signal,

wherein the portions of the mixed-in signal that are identified as the speech patterns are processed as the voice data,

wherein remaining portions of the mixed-in signal are processed as the received application data,

wherein the demodulator demodulates the received application data,

wherein the descrambler descrambles the received application data,

wherein the bit-based LLR estimator estimates LLRs for bits of the descrambled application data,

wherein the symbol LLR estimator estimates the LLRs for symbols of the descrambled application data,

wherein the probabilistic sequence estimator module selects a best generated result from the bit-based LLR estimator, and

wherein the error detection module applies error detection on the best generated result from the LLR estimator.

17. The modem of claim 16 wherein the adaptive modulator applies a plurality of modulation waveforms to the application data to generate multiple modulated copies of the application data, and wherein the multiple modulated copies of the application data are processed by the vocoder for transmission over the voice channel.

18. The modem of claim 16 wherein the application data is a portion of sensitive data, and wherein the remaining portion of the sensitive data is transported via a data communications network.