Method and apparatus for signal detection and jamming

• US 7,023,374 B2
• Filed: 10/06/2002
• Issued: 04/04/2006
• Est. Priority Date: 10/16/2001
• Status: Expired due to Fees

• Current Assignee: Abraham Jossef, Ron Yaacov Davidson
• Original Assignee: Abraham Jossef, Ron Yaacov Davidson
• Inventors: Hect, Itay, Jossef, Abraham, Davidson, Ron Yaacov, Levin, Raviv
• Primary Examiner(s): Sotomayor, John B.
• Application Number:
  US10/491,450
• Publication Number:
  US 20040263378A1
• Time in Patent Office: 1,276 Days
• Field of Search: 342 13- 15, 342/20, 342/83, 342/175, 342/194, 342/195, 342/198, 455/226.1, 455/227, 455/228, 455/229
• US Class Current: 342/20
• CPC Class Codes: G01S 7/022 Road traffic radar detectors
• CPC Class Codes: G01S 7/38 Jamming means, e.g. producing false echoes
• CPC Class Codes: H04K 3/42 characterized by the control of the jamming frequency or wavelength
• CPC Class Codes: H04K 3/45 characterized by including monitoring of the target or target signal, e.g. in reactive jammers or follower jammers for example by means of an alternation of jamming phases and monitoring phases, called "look-through mode"
• CPC Class Codes: H04K 3/822 by detecting the presence of a surveillance, interception or detection

Abstract

Apparatus and method for multi-band, multi-frequency signal detection and transmission, comprising a multi-band wideband antenna, a receiver based on a plurality of synthesized down-converters and a plurality of synthesized programmable multi-channel phase-locked LOs, a DDS and a synthesized complex I/Q phase-detector, a control center based on a DSP connected with an ADC, plurality of DACs and an FPGA, and a plurality of synthesized programmable multi-channel transmitters synchronized with the DDS.

Claims

1. Apparatus for multi-band, multi-frequency signal detection and transmission, comprising:

a multi-band wideband antenna for receiving said signals;

a receiver, connected with said antenna, said receiver comprising;

a plurality of low-noise amplifiers (LNAs);

a DDS driven by a reference source;

a plurality of synthesized down-converters, each of said plurality of down-converters connected with a respective one of said LNAs;

a plurality of synthesized programmable multi-channel phase-locked LOs based on said DDS, wherein each of said plurality of down-converters is connected with a respective one of said synthesized progran-iniable multi-channel LOs and wherein each of said LOs is synchronized with said DDS; and

a synthesized complex I/Q phase-detector comprising an LO, said phase-detector synthesized LO based on said DDS, said phase-detector connected with said down-converters;

a control center comprising;

a powerful DSP;

a memory unit connected with said DSP;

analog-to-digital converter (ADC) connected with said I/Q phase detector and with said DSP;

a plurality of digital-to-analog converters (DACs) connected with said DSP; and

FPGA connected with said DSP and with said plurality of programmable synthesized receiver LOs, said FPGA additionally connected with said DDS for programming controls; and

a multi-band transmitter comprising;

a plurality of synthesized programmable multi-channel transmitters based on said DDS, each of said transmitters synchronized with said DDS and each of said transmitters connected with said FPGA for receiving programming controls; and

a plurality of multi-band wide-band antennae for transmitting.

3. Apparatus according to any one of claims 1 or 2 wherein said DSP is operable to execute a jamming program.

4. Apparatus according to claim 3 wherein said apparatus is a radar detector and jammer.

7. Apparatus according any one of claims 1 or 2 wherein said DDS resides in said transmitter unit.

9. Apparatus according to any one of claims 1, 2 or 8 wherein said receiver unit comprises three modes of operation for detecting a signal:

coarse search, fine search and acquisition.

10. Apparatus according to claim 9 wherein said coarse search comprises wideband high dynamic-range detection at 100 MHz bandwidth with −

82 dBm sensitivity and wherein said coarse search may be conducted simultaneously for all required bands.

11. Apparatus according to claim 10, wherein said coarse search additionally comprises monitoring RDD activity.

12. Apparatus according to claim 9 wherein said fine search comprises detection at 100 MHz bandwidth with −

98 dBm sensitivity.

13. Apparatus according to claim 9 wherein said acquisition comprises detection at 2.5 KHz bandwidth.

14. Apparatus according to claim 9, additionally composing digitally adaptive references, said references used by said three modes of operation to enhance detection accuracy.

15. Apparatus according to any one of claims 1, 2 or 8 wherein said antenna for receiving comprises a plurality of antennae;

selected from the group consisting of antenna to cover the X band frequencies, antenna to cover the Ku band frequencies, antenna to cover the K band frequencies and antenna to cover the Ka band frequencies.

16. Apparatus according to claim 15 wherein said antenna is a planar/patch antenna.

20. Apparatus according to any one of claims 1, 2 or 17 wherein said antennae for transmitting are planar/patch-antennae.

21. Apparatus according to any one of claims 1, 2, or 17, additionally comprising at least one of the group consisting of a GPS device connected with said DSP, a user-interface device connected with said DSP and a detachable memory, said user-interface device selected from the group consisting of a keyboard, a display and a PDA and said detachable memory selected from the group consisting of a non-volatile memory and a flash-card.

22. Apparatus according to any one of claims 1 or 17 wherein said transmitters comprise phase-locked VCOs using fractional N division.

2. Apparatus for multi-band, multi-frequency signal detection and transmission, comprising:

a multi-band wideband antenna for receiving said signals;

a receiver, connected with said antenna, said receiver comprising;

a plurality of low-noise amplifiers (LNAs);

a DDS driven by a reference source;

a plurality of synthesized down-converters, each of said plurality of down-converters connected with a respective one of said LNAs;

a plurality of synthesized programmable multi-channel phase-locked LOs based on said DDS, wherein each of said plurality of down-converters is connected with a respective one of said synthesized programmable multi-channel LOs and wherein each of said LOs is synchronized with said DDS; and

a synthesized complex I/Q phase-detector comprising a synthesized LO, said phase-detector synthesized LO based on said DDS, said phase-detector connected with said down-converters;

control center comprising;

a powerful DSP;

a memory unit connected with said DSP;

analog-to-digital converter (ADC) connected with said L/Q phase detector and with said DSP;

a plurality of digital-to-analog converters (DACs) connected with said DSP; and

FPGA connected with said DSP and with said plurality of programmable synthesized receiver LOs, said FPGA additionally connected with said DDS for programming controls; and

a multi-band transmitter comprising;

a plurality of multi-channel free-run VCOs, each of said VCOs connected with a respective one of said DACs for voltage tuning; and

a plurality of multi-band wide-band antennae for transmitting.

5. Apparatus according to claim 2 wherein said free-run VCOs are synchronized with said receiver LOs in a calibration process using said DSP.

6. Apparatus according to claim 2 wherein said free-run VCOs are based on FET.

8. Apparatus for multi-band, multi-frequency signal detection, comprising:

a multi-band wideband antenna for receiving said signals;

a receiver, connected with said antenna, said receiver comprising;

a plurality of low-noise amplifiers (LNAs);

a DDS driven by a reference source;

a plurality of synthesized down-converters, each of said plurality of down-converters connected with a respective one of said LNAs;

a plurality of synthesized programmable multi-channel phase-locked LOs based on said DDS, wherein each of said plurality of down-converters is connected with a respective one of said synthesized programmable multi-channel LOs and wherein each of said LOs is synchronized with said DDS; and

a synthesized complex I/Q phase-detector comprising an LO, said phase-detector LO based on said DDS, said phase-detector connected with said down-converters;

a control center comprising;

a powerful DSP;

a memory unit connected with said DSP;

analog-to-digital converter (ADC) connected with said I/Q phase detector and with said DSP;

a plurality of digital-to-analog converters (DACs) connected with said DSP; and

FPGA connected with said DSP and with said plurality of programmable receiver LOs, said FPGA additionally connected with said DDS for programming controls.

17. Apparatus for multi-band, multi-frequency signal transmission, comprising:

a control center comprising;

a powerful DSP;

a memory unit connected with said DSP;

FPGA connected with said DSP;

a DDS driven by a reference source and connected with said FPGA for programming controls; and

a multi-band transmitter, comprising;

a plurality of synthesized programmable multi-channel transmitters based on said DDS, each of said transmitters synchronized with said DDS and each of said transmitters connected with said FPGA for receiving programming controls; and

a plurality of multi-band wide-band antennae for transmitting.

18. Apparatus according to claim 17 wherein said DSP is operable to execute a jamming program.

19. Apparatus according to claim 18 wherein said apparatus is a radar jammer.

23. A method of detecting multi-band multi-channel signals, said method comprising the steps of:

receiving a signal;

down-converting said received signal to a base-band signal, wherein said base-band signal comprises a complex I and Q vector;

converting said I and Q from analog to digital;

processing said digital signal using FFT to locate the signal in the filtered frequency domain, said step of processing comprising the steps of;

dividing said base-band bandwidth into F frequency sub-domains;

repeating said step of dividing for each relevant one of said sub-domains R times; and

following each of said dividing steps, storing information with respect to said digital signal signature.

24. A method according to claim 23, additionally comprising the step of using said stored signature for determining whether said signal is a signals of interest.

26. The method according to any one of claims 24 or 25 wherein said signals of interest are radar signals.

27. A method according to any one of claims 24 or 25 wherein said signal of interest are determined regionally.

28. A method according to any one of claims 23 or 25 wherein said digital signal signature comprises:

frequency, amplitude, frequency rate change, complex I/Q vector direction, last update time and lock quality.

25. A method of detecting and transmitting multi-band multi-channel signals of interest, comprising the steps of:

receiving a signal;

down-converting said received signal to a base-band signal, wherein said base-band signal comprises a complex I and Q vector;

converting said I and Q from analog to digital;

processing said digital signal using FFT to locate the signal in the filtered frequency domain, said step of processing comprising the steps of;

dividing said base-band bandwidth into F frequency sub-domains;

repeating said step of dividing for each relevant one of said sub-domains R times; and

following each of said dividing steps, storing information with respect to said digital signal signature;

using said stored signature for determining whether said signal is one of said signals of interest; and

transmitting a signal, based on said stored signature of said detected signal of interest.

29. A method according to claim 25 wherein said step of transmitting comprises the steps of:

setting a maximum speed for jamming; and

selecting a jamming mode.

30. A method according to claim 29 wherein said jamming mode comprises at least one of the group consisting of random, constant, FM modulation, fraction and descending modes and wherein said random mode comprises transmitting a random frequency not higher than said maximum speed frequency;

said constant mode comprises transmitting a constant frequency not higher than said maximum speed frequency;

said FM modulation mode comprises transmitting a linearly or non-linearly modulated frequency not higher than said maximum speed frequency;

said fraction mode comprises transmitting a fraction of the real speed frequency; and

said descending mode comprises transmitting a descending frequency, said descending frequency starting at said maximum speed frequency.

31. A method according to claim 30 wherein said descending mode additionally comprises alternately transmitting an ascending frequency.

32. A method according to claim 30 wherein each of said jamming modes comprises frequency hopping.