Method for the secure transmission of information using multiple LPD and LPI secondary carriers under a primary carrier with relative carrier offset

1. A method of reducing probability of detection and interception of a sub-carrier signal comprising:

encoding, using an encoder, information that is to be transmitted via the sub-carrier signal;

modulating, using a modulator, the encoded information such that a modulated sub-carrier signal results;

spreading, using a spreader, the modulated sub-carrier signal such that a spread sub-carrier signal results;

combining, using an embedding device, the spread sub-carrier signal and an original carrier signal such that a composite carrier signal results; and

transmitting the composite carrier signal such that the spread sub-carrier signal is at a frequency that is dynamic relative to a static frequency of the original carrier signal.

2. The method of claim 1 , further comprising:

encrypting, using an encryption device, the information prior to encoding.

3. The method of claim 1 , wherein the spreading uses a Pseudo Random Number (PRN) such that the spread sub-carrier signal has a Direct Sequence Spread Spectrum (DSSS).

4. The method of claim 1 , wherein the spreading uses a PRN to randomize a Frequency Hopping Spread Spectrum (FHSS) that results in hopping of a center frequency of the sub-carrier signal.

5. The method of claim 4 , further comprising steering the center frequency of the sub-carrier signal relative to a center frequency of the original carrier signal using a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO).

6. A method of reducing probability of detection and interception of a sub-carrier signal comprising:

encoding, using an encoder, information that is to be transmitted via the sub-carrier signal;

modulating, using a modulator, the encoded information such that a modulated sub-carrier signal results;

spreading, using a spreader, the modulated sub-carrier signal such that a spread sub-carrier signal results;

combining, using an embedding device, the spread sub-carrier signal and an original carrier signal such that a composite carrier signal results; and

transmitting the composite carrier signal such that the spread sub-carrier signal is at a frequency that is dynamic relative to the original carrier signal that has a dynamic frequency wherein the differential between the frequencies of the sub-carrier signal and original carrier signal is dynamic.

7. The method of claim 6 , further comprising:

encrypting, using an encryption device, the information prior to encoding.

8. The method of claim 6 , wherein the spreading uses a Pseudo Random Number (PRN) such that the spread sub-carrier signal has a Direct Sequence Spread Spectrum (DSSS).

9. The method of claim 6 , wherein the spreading uses a PRN to randomize a Frequency Hopping Spread Spectrum (FHSS) that results in hopping of a center frequency of the sub-carrier signal.

10. The method of claim 9 , further comprising steering the center frequency of the sub-carrier signal relative to a center frequency of the original carrier signal using a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO).

11. The method of claim 6 , further comprising using a PRN to randomize a Frequency Hopping Spread Spectrum (FHSS) that results in hopping of a center frequency of the original carrier signal.

12. The method of claim 11 , further comprising steering the center frequency of the original carrier signal using a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO).

13. A method of reducing probability of detection and interception of a sub-carrier signal comprising:

encoding, using an encoder, information that is to be transmitted via the sub-carrier signal;

modulating, using a modulator, the encoded information such that a modulated sub-carrier signal results;

spreading, using a spreader, the modulated sub-carrier signal such that a spread sub-carrier signal results;

combining, using an embedding device, the sub-carrier signal and an original carrier signal such that a composite carrier signal results; and

transmitting the composite carrier signal such that the spread sub-carrier signal is at a frequency that is dynamic relative to the original carrier signal having a dithering frequency movement wherein the differential between the frequencies of the sub-carrier signal and original carrier signal is constant.

14. The method of claim 13 , further comprising:

encrypting, using an encryption device, the information prior to encoding.

15. The method of claim 13 , wherein the spreading uses a Pseudo Random Number (PRN) such that the spread sub-carrier signal has a Direct Sequence Spread Spectrum (DSSS).

16. The method of claim 13 , further comprising using a control algorithm to dither a center frequency of the original carrier signal.

17. The method of claim 16 , further comprising steering the center frequency of the original carrier signal using a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO).

18. The method of claim 13 , wherein the spreading uses a PRN to randomize a Frequency Hopping Spread Spectrum (FHSS) for dithering a center frequency of the sub-carrier signal.

19. The method of claim 18 , further comprising steering the center frequency of the sub-carrier signal relative to a center frequency of the original carrier signal using a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO).

20. A method of receiving a sub-carrier signal having reduced probability of detection and interception comprising:

receiving, using a receiving device, a composite carrier signal comprising an original carrier signal having a static frequency and a sub-carrier signal;

despreading, using a despreader the sub-carrier signal;

demodulating, using a demodulator, the despread sub-carrier signal;

decoding, using a decoder, information received within the demodulated sub-carrier signal using the static frequency of the original carrier signal as a reference to determine a frequency offset of the sub-carrier signal relative to the original carrier signal based on an a priori PRN sequence; and

using a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO) to steer the center frequency of the sub-carrier signal relative to a center frequency of the original carrier signal.

21. The method of claim 20 , further comprising receiving, using a static frequency receiver, the original carrier signal.

22. The method of claim 20 , further comprising decrypting, using a decryption device, the decoded information.

23. A method of receiving a sub-carrier signal having reduced probability of detection and interception comprising:

receiving, using a receiving device, a composite carrier signal comprising an original carrier signal having a frequency hopping center frequency and a sub-carrier signal;

despreading, using a despreader the sub-carrier signal;

demodulating, using a demodulator, the despread sub-carrier signal; and

decoding, using a decoder, information received within the demodulated sub-carrier signal using the frequency hopping center frequency of the original carrier signal as a reference to determine a frequency offset of the sub-carrier signal relative to the original carrier signal based on an a priori PRN sequence; and

using a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO) to steer the center frequency of the original carrier signal and to steer a center frequency of the sub-carrier signal relative to the center frequency of the original carrier signal.

24. The method of claim 23 , further comprising receiving, using a frequency hopping spread spectrum receiver, the original carrier signal.

25. The method of claim 23 , further comprising decrypting, using a decryption device, the decoded information.

26. A method of receiving a sub-carrier signal having reduced probability of detection and interception comprising:

receiving, using a receiving device, a composite carrier signal comprising an original carrier signal having a dithering frequency and a sub-carrier signal;

despreading, using a despreader the sub-carrier signal;

demodulating, using a demodulator, the despread sub-carrier signal; and

decoding, using a decoder, information received within the demodulated sub-carrier signal using the dithering frequency of the original carrier signal as a reference to determine a frequency offset of the sub-carrier signal relative to the original carrier signal based on an a priori PRN sequence; and

using a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO) to steer a center frequency of the original carrier signal and to steer a center frequency of the sub-carrier signal relative to the center frequency of the original carrier signal.

27. The method of claim 26 , further comprising receiving, using a frequency agile receiver, the original carrier signal.

28. The method of claim 26 , further comprising decrypting, using a decryption device, the decoded information.

29. A system for reducing probability of detection and interception of a sub-carrier signal comprising:

an encoder that encodes information that is to be transmitted via the sub-carrier signal;

a modulator that modulates the encoded information such that a modulated sub-carrier signal results;

a spreader that spreads the modulated sub-carrier signal such that a spread sub-carrier signal results;

an embedding device that combines the sub-carrier signal and an original carrier signal such that a composite carrier signal results; and

a transmitting device that transmits the composite carrier signal such that the spread sub-carrier signal is at a frequency that is dynamic relative to the original carrier signal that has a static frequency.

30. The system of claim 29 , further comprising:

an encryption device that encrypts the information prior to encoding.

31. The system of claim 29 , wherein the spreader uses a Pseudo Random Number (PRN) such that the spread sub-carrier signal has a Direct Sequence Spread Spectrum (DSSS).

32. The system of claim 29 , wherein the spreader uses a PRN to randomize a Frequency Hopping Spread Spectrum (FHSS) that results in hopping of a center frequency of the sub-carrier signal.

33. The system of claim 32 , further comprising a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO) that steers the center frequency of the sub-carrier signal relative to a center frequency of the original carrier signal.

34. A system of reducing probability of detection and interception of a sub-carrier signal comprising:

an encoder that encodes information that is to be transmitted via the sub-carrier signal;

a modulator that modulates the encoded information such that a modulated sub-carrier signal results;

a spreader that spreads the modulated sub-carrier signal such that a spread sub-carrier signal results;

an embedding device that combines the sub-carrier signal and an original carrier signal such that a composite carrier signal results; and

a transmitting device that transmits the composite carrier signal such that the spread sub-carrier signal is at a frequency that is dynamic relative to the original carrier signal that has a dynamic frequency wherein the differential between the frequencies of the sub-carrier signal and original carrier signal is dynamic.

35. The system of claim 34 , further comprising:

an encryption device that encrypts the information prior to encoding.

36. The system of claim 34 , wherein the spreader uses a Pseudo Random Number (PRN) such that the spread sub-carrier signal has a Direct Sequence Spread Spectrum (DSSS).

37. The system of claim 34 , wherein the spreader uses a PRN to randomize a Frequency Hopping Spread Spectrum (FHSS) that results in hopping of a center frequency of the sub-carrier signal.

38. The system of claim 37 , further comprising a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO) that steers the center frequency of the sub-carrier signal relative to a center frequency of the original carrier signal.

39. The system of claim 34 , further comprising a PRN that randomizes a Frequency Hopping Spread Spectrum (FHSS) and results in hopping of a center frequency of the original carrier signal.

40. The system of claim 39 , further comprising a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO) that steers the center frequency of the original carrier signal.

41. A system of reducing probability of detection and interception of a sub-carrier signal comprising:

an encoder that encodes information that is to be transmitted via the sub-carrier signal;

a modulator that modulates the encoded information such that a modulated sub-carrier signal results;

a spreader that spreads the modulated sub-carrier signal such that a spread sub-carrier signal results;

an embedding device that combines the sub-carrier signal and an original carrier signal such that a composite carrier signal results; and

a transmitting device that transmits the composite carrier signal such that the spread sub-carrier signal is at a frequency that is dynamic relative to the original carrier signal that has a dithering frequency movement wherein the differential between the frequencies of the sub-carrier signal and original carrier signal is constant.

42. The system of claim 41 , further comprising:

an encryption device that encrypts the information prior to encoding.

43. The system of claim 41 , wherein the spreader uses a Pseudo Random Number (PRN) such that the spread sub-carrier signal has a Direct Sequence Spread Spectrum (DSSS).

44. The system of claim 41 , further comprising a control algorithm that dithers a center frequency of the original carrier signal.

45. The system of claim 44 , further comprising a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO) that steers the center frequency of the original carrier signal.

46. The system of claim 41 , wherein the spreader uses a PRN to randomize a Frequency Hopping Spread Spectrum (FHSS) for dithering a center frequency of the sub-carrier signal.

47. The system of claim 46 , further comprising a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO) that steers the center frequency of the sub-carrier signal relative to a center frequency of the original carrier signal using a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO).

48. A system for receiving a sub-carrier signal having reduced probability of detection and interception comprising:

a receiving device that receives a composite carrier signal comprising an original carrier signal having a static frequency and a sub-carrier signal;

a despreader that despreads the sub-carrier signal;

a demodulator that demodulates the despread sub-carrier signal;

a decoder that decodes information received within the demodulated sub-carrier signal using the static frequency of the original carrier signal as a reference to determine a frequency offset of the sub-carrier signal relative to the original carrier signal based on an a priori PRN sequence; and

a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO) that steers a center frequency of the sub-carrier signal relative to a center frequency of the original carrier signal.

49. The system of claim 48 , further comprising a static frequency receiver that receives the original carrier signal.

50. The system of claim 48 , further comprising a decryption device that decrypts the decoded information.

51. A system for receiving a sub-carrier signal having reduced probability of detection and interception comprising:

a receiving device that receives a composite carrier signal comprising an original carrier signal having a static frequency and a sub-carrier signal;

a despreader that despreads the sub-carrier signal;

a demodulator that demodulates the despread sub-carrier signal;

a decoder that decodes information received within the demodulated sub-carrier signal using the frequency hopping center frequency of the original carrier signal as a reference to determine a frequency offset of the sub-carrier signal relative to the original carrier signal based on an a priori PRN sequence; and

a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO) that steers the center frequency of the original carrier signal and steers a center frequency of the sub-carrier signal relative to the center frequency of the original carrier signal.

52. The system of claim 51 , further comprising a frequency hopping spread spectrum receiver that receives the original carrier signal.

53. The system of claim 51 , further comprising a decryption device that decrypts the decoded information.

54. A system for receiving a sub-carrier signal having reduced probability of detection and interception comprising:

a receiving device that receives a composite carrier signal comprising an original carrier signal having a static frequency and a sub-carrier signal;

a despreader that despreads the sub-carrier signal;

a demodulator that demodulates the despread sub-carrier signal; and

a decoder that decodes information received within the demodulated sub-carrier signal using the dithering frequency of the original carrier signal as a reference to determine a frequency offset of the sub-carrier signal relative to the original carrier signal based on an a priori PRN sequence; and

a Direct Digital Synthesizer (DDS) or a Number Controlled Oscillator (NCO) that steers a center frequency of the original carrier signal and steers a center frequency of the sub-carrier signal relative to the center frequency of the original carrier signal.

55. The system of claim 54 , further comprising a frequency agile receiver that receives the original carrier signal.

56. The system of claim 54 , further comprising a decryption device that decrypts the decoded information.