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- Nachgewiesen in: USPTO Patent Grants
- Sprachen: English
- Patent Number: 9,844,061
- Publication Date: December 12, 2017
- Appl. No: 14/980493
- Application Filed: December 28, 2015
- Assignees: Genghiscomm Holdings, LLC (Boulder, CO, US)
- Claim: 1. A non-transitory computer readable storage medium residing in a transmitter and having computer readable code thereon configured to: select a decoy data signal as a carrier signal; synthesize a precoding matrix comprising data-bearing synthesized multipath distortions; and precode the decoy data signal with the precoding matrix to produce a precoded data signal to be transmitted to an intended receiver.
- Claim: 2. The medium recited in claim 1 , further comprising instructions to communicate an undistorted version of the decoy data signal to the intended receiver.
- Claim: 3. The medium recited in claim 1 , wherein the synthesized multipath distortions are a function of channel measurements made by at least one of the transmitter and the intended receiver.
- Claim: 4. The medium recited in claim 1 , wherein the decoy data signal comprises at least one of a retransmitted signal, a data signal supplied by a third party, a predetermined data sequence that is locally reproduced by the intended receiver, a predetermined data sequence stored in memory at the intended receiver, a known training sequence, and a data sequence generated at the transmitter wherein a clean replica is supplied to the intended receiver via an alternative channel.
- Claim: 5. The medium recited in claim 1 , wherein the precoding matrix is configured to pre-equalize natural distortions in at least one channel between the transmitter and the intended receiver.
- Claim: 6. The medium recited in claim 1 , wherein the decoy data signal comprises an OFDM signal, and the medium further comprises instructions to perform a discrete Fourier transform to generate at least one of the decoy data signal and the precoded data signal.
- Claim: 7. The medium recited in claim 1 , further comprising instructions to multiplex the decoy data signal with the precoded data signal.
- Claim: 8. A non-transitory computer readable storage medium having computer readable code thereon configured to: receive from a multipath channel, a distorted signal comprising a decoy data signal precoded with a precoding matrix comprising synthesized data-bearing multipath distortions; receive a clean decoy data signal; and remove natural multipath distortions and the decoy data signal from the distorted signal for decoding transmitted data from the synthesized data-bearing multipath distortions.
- Claim: 9. The medium recited in claim 8 , wherein the clean decoy data signal comprises at least one of a decoy data signal received from a third-party network, a decoy data signal received from a different channel in a network from which the distorted signal is received, a known training sequence, a locally stored data sequence, and a locally generated data sequence.
- Claim: 10. The medium recited in claim 8 , wherein the precoding matrix is configured to equalize the natural multipath distortions such that the distorted signal comprises the decoy data signal and the synthesized data-bearing multipath distortions.
- Claim: 11. The medium recited in claim 8 , wherein the decoy data signal comprises an OFDM signal, and the medium further comprises instructions to perform a discrete Fourier transform of the distorted signal.
- Claim: 12. A transmitter, comprising: a distortion synthesizer configured to generate a precoding matrix from a data signal to be transmitted to an intended receiver; and a precoder configured to employ the precoding matrix to precode a decoy data signal to produce a precoded signal comprising information-bearing synthesized channel distortions.
- Claim: 13. The transmitter recited in claim 12 , further comprising at least one of a decoy data signal generator configured to produce the decoy data signal, and a receiver configured to receive a third-party transmission to employ as the decoy data signal.
- Claim: 14. The transmitter recited in claim 12 , wherein the distortion synthesizer configures the precoding matrix to pre-equalize natural distortions in at least one channel between the transmitter and the intended receiver.
- Claim: 15. The transmitter recited in claim 12 , further comprising a secondary transmitter configured to transmit a clean version of the decoy data signal to the intended receiver.
- Claim: 16. The transmitter recited in claim 12 , wherein the decoy data signal comprises an OFDM signal, and the precoder comprises a discrete Fourier transform configured to generate at least one of the decoy data signal and the precoded data signal.
- Claim: 17. A receiver, comprising: a receiving system configured to receive from a multipath channel, a distorted signal comprising a decoy data signal precoded with a precoding matrix comprising synthesized data-bearing multipath distortions; the receiving system further configured to receive a clean decoy data signal; and a decoding system configured to remove the decoy data signal and any natural multipath distortions from the distorted signal to decode data from the synthesized data-bearing multipath distortions.
- Claim: 18. The receiver recited in claim 17 , wherein the receiving system is configured for at least one of receiving the clean decoy data signal from a third-party network, receiving the clean decoy data signal from a different channel in a network from which the distorted signal is received, receiving the clean decoy data signal from a locally stored data sequence, and receiving the clean decoy data signal from a locally generated data sequence.
- Claim: 19. The receiver recited in claim 17 , wherein the decoding system comprises an equalizer configured to equalize the natural multipath distortions in the distorted signal.
- Claim: 20. The receiver recited in claim 17 , wherein at least one of the receiving system and the decoding system comprises a discrete Fourier transform.
- Claim: 21. The receiver recited in claim 17 , the decoding system is configured to employ an encryption key based on measurements of at least one channel between the receiver and an intended transmitter for decoding the synthesized data-bearing multipath distortions.
- Patent References Cited: 6031913 February 2000 Hassan et al. ; 6686879 February 2004 Shattil ; 7430257 September 2008 Shattil ; 8051181 November 2011 Larson et al. ; 8122505 February 2012 Verma ; 8180057 May 2012 Delaney et al. ; 8670390 March 2014 Shattil ; 2002/0067757 June 2002 Philips et al. ; 2005/0228659 October 2005 Mitlin ; 2006/0034177 February 2006 Schrempp ; 2008/0232238 September 2008 Agee ; 2009/0003591 January 2009 Murakami ; 2011/0033044 February 2011 Britz ; 2011/0170574 July 2011 Ripple et al. ; 2011/0173696 July 2011 Dynes et al. ; 2013/0078954 March 2013 Fan et al. ; 2015/0049713 February 2015 Lan
- Other References: J.L. Brooks, Et al., “Coherence Multiplexing of Fiber-optic Interferometric Sensors,” Journal of Lightwave Technology, vol. LT-3, No. 5, Oct. 1985. cited by applicant ; A.O. Hero, “Secure space-time communication,” IEEE Transactions on Information Theory, vol. 49, No. 12, pp. 3235-3249, Dec. 2003. cited by applicant ; R.M. Narayanan, “Sensing and Communications Using Ultrawideband Random Noise Waveforms,” 2005 AFOSR Program Review for Sensing, Imaging and Object Recognition, Raleigh, NC, May 26, 2005. cited by applicant
- Primary Examiner: Bhatti, Hashim
- Attorney, Agent or Firm: Shattil, Steven J.
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