Generating A Time Deterministic, Spectrally Noncoherent Signal

• US 20090016410A1
• Filed: 07/13/2007
• Published: 01/15/2009
• Est. Priority Date: 07/13/2007
• Status: Active Grant

• Current Assignee: Raytheon Company (Rtx Corporation)
• Original Assignee: Raytheon Company (Rtx Corporation)
• Inventors: Brock, Eddie R.
• Granted Patent: US 8,358,240 B2
• Time in Patent Office: Days
• US Class Current: 375/130
• CPC Class Codes: G01S 7/38 Jamming means, e.g. producing false echoes
• CPC Class Codes: H04B 1/71635 Transmitter aspects H04B1/7174 takes precedence
• CPC Class Codes: H04B 1/7174 Pulse generation in general H04L25/03834
• CPC Class Codes: H04L 25/03834 using pulse shaping

Abstract

According to one embodiment, a system for generating a signal includes a monocycle generator, one or more temporal modulators, and a pulse shaper. The monocycle generator generates monocycles that form a signal comprising pulses, where a pulse corresponds to one or more monocycles. The temporal modulators provide instructions the monocycle generator to create a specific spectral response in the signal. A pulse shaper individually modulates at least one monocycle of the monocycles corresponding to a pulse to shape the pulse.

Claims

1. A system for generating a signal, comprising:

a monocycle generator operable to generate a plurality of monocycles forming a signal comprising a plurality of pulses, a pulse of the plurality of pulses corresponding to one or more monocycles of the plurality of monocycles;

one or more temporal modulators coupled to the monocycle generator and operable to provide instructions the monocycle generator to create a specific spectral response in the signal; and

a pulse shaper coupled to the monocycle generator and operable to perform the following for each pulse of the plurality of pulses;

individually modulate at least one monocycle of the one or more monocycles corresponding to the each pulse to shape the each pulse.

2. The system of claim 1, further comprising:

an information modulator coupled to the monocycle generator and operable to modulate the signal to encode information content into the signal.

3. The system of claim 1, wherein the specific spectral response refers to a noncoherent spectral response.

4. The system of claim 1, wherein the one or more temporal modulators comprises:

a numerical code generator operable to provide a numerical code to yield a specific spectral response in the signal.

5. The system of claim 1, wherein the one or more temporal modulators comprises:

a pulse repetition interval generator operable to provide a control signal to trigger generation of the plurality of monocycles.

6. The system of claim 1, wherein the pulse shaper is operable to individually modulate the at least one monocycle by:

dividing the signal to separate the one or more monocycles; and

modulating the at least one monocycle individually of the other monocycles of the one or more monocycles.

7. The system of claim 1, wherein the pulse shaper is operable to individually modulate the at least one monocycle by:

attenuating an amplitude of the at least one monocycle.

8. The system of claim 1, wherein the signal is time deterministic.

9. The system of claim 1, wherein the signal has a frequency greater than 30 gigahertz.

10. A method for generating a signal, comprising:

generating a plurality of monocycles forming a signal comprising a plurality of pulses, a pulse of the plurality of pulses corresponding to one or more monocycles of the plurality of monocycles;

providing instructions to create a specific spectral response in the signal; and

performing the following for each pulse of the plurality of pulses;

individually modulating at least one monocycle of the one or more monocycles corresponding to the each pulse to shape the each pulse.

11. The method of claim 10, further comprising:

modulating the signal to encode information content into the signal.

12. The method of claim 10, wherein the specific spectral response refers to a noncoherent spectral response.

13. The method of claim 10, wherein providing instructions to create the specific spectral response in the signal comprises:

providing a numerical code to yield a specific spectral response in the signal.

14. The method of claim 10, wherein providing instructions to create the specific spectral response in the signal comprises:

providing a control signal to trigger generation of the plurality of monocycles.

15. The method of claim 10, wherein individually modulating the at least one monocycle of the one or more monocycles further comprises:

dividing the signal to separate the one or more monocycles; and

modulating the at least one monocycle individually of the other monocycles of the one or more monocycles.

16. The method of claim 10, wherein individually modulating the at least one monocycle of the one or more monocycles further comprises:

attenuating an amplitude of the at least one monocycle.

17. The method of claim 10, wherein the signal is time deterministic.

18. The method of claim 10, wherein the signal has a frequency greater than 30 gigahertz.

19. A system for generating a signal, comprising:

means for generating a plurality of monocycles forming a signal comprising a plurality of pulses, a pulse of the plurality of pulses corresponding to one or more monocycles of the plurality of monocycles;

means for providing instructions to create a specific spectral response in the signal; and

means for performing the following for each pulse of the plurality of pulses;

individually modulating at least one monocycle of the one or more monocycles corresponding to the each pulse to shape the each pulse.

20. A system for generating a signal, comprising:

a monocycle generator operable to generate a plurality of monocycles forming a signal comprising a plurality of pulses, a pulse of the plurality of pulses corresponding to one or more monocycles of the plurality of monocycles;

one or more temporal modulators coupled to the monocycle generator and operable to provide instructions the monocycle generator to create a specific spectral response in the signal, the specific spectral response referring to a noncoherent spectral response, the one or more temporal modulators comprising;

a numerical code generator operable to provide a numerical code to yield a specific spectral response in the signal; and

a pulse repetition interval generator operable to provide a control signal to trigger generation of the plurality of monocycles;

an information modulator coupled to the monocycle generator and operable to modulate the signal to encode information content into the signal; and

a pulse shaper coupled to the monocycle generator and operable to perform the following for each pulse of the plurality of pulses;

individually modulate at least one monocycle of the one or more monocycles corresponding to the each pulse to shape the each pulse by;

dividing the signal to separate the one or more monocycles; and

modulating the at least one monocycle individually of the other monocycles of the one or more monocycles by attenuating an amplitude of the at least one monocycle, the signal being time deterministic, the signal having a frequency greater than 30 gigahertz.