Photonically enabled RF transmitter/receiver

Patent metadata

Field	Value
Publication number	US-9335406-B2
Application number	US-201313946202-A
Country	US
Kind code	B2
Filing date	Jul 19, 2013
Priority date	Jul 23, 2012
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

A detection system includes a photonic module, a radio frequency (RF) module and processing circuitry. The photonic module may be configured to generate an optical tone for modulation in an optical domain prior to conversion to the RF domain. The RF module may be configured to interface with the photonic module to receive a transmission signal converted from the optical domain. The processing circuitry may be configured to interface with the photonic module and RF module to enable an operator to control of the photonic module and the RF module at least with respect to selectively determining a carrier frequency of the optical tone and a modulation technique to be employed with respect to the transmission signal converted from the optical domain.

First claim

What is claimed is:

1. A system comprising:
a photonic module configured to generate an optical tone for modulation in an optical domain prior to conversion to a radio frequency (RF) domain;
a RF module configured to interface with the photonic module to receive a transmission signal converted from the optical domain; and
processing circuitry configured to interface with the photonic module and RF module to enable an operator to perform software defined control of the photonic module and the RF module at least with respect to selectively determining a carrier frequency of the optical tone and a modulation technique to be employed with respect to the transmission signal converted from the optical domain.

2. The system of claim 1 , wherein the processing circuitry is configured to selectively determine the carrier frequency as a carrier frequency in the MHz range to the THz range.

3. The system of claim 1 , wherein the photonic module comprises an optical-to-RF converter configured to employ photonic up-conversion onto a carrier during conversion from the optical domain to the RF domain.

4. The system of claim 1 , wherein the photonic module comprises a photonic dual-optical tone generator configured to employ dual wavelength carrier tone generation.

5. The system of claim 4 , wherein the photonic dual-optical tone generator is configured to employ dual-sideband suppressed-carrier for dual wavelength carrier tone generation.

6. The system of claim 1 , wherein the photonic module comprises a photonic waveform encoder configured to employ photonic-modulation for waveform encoding.

7. The system of claim 6 , wherein the photonic waveform encoder is configured to employ single-sideband suppressed-carrier modulation for waveform encoding.

8. The system of claim 1 , wherein the processing circuitry is configured to selectively determine the modulation technique by selecting one or more of a waveform, bandwidth, pulse length and repetition frequency to be employed for the modulation.

9. The system of claim 1 , wherein the processing circuitry is further configured to enable the operator to perform mode selection via software defined control of the photonic module or the RF module.

10. The system of claim 9 , wherein performing mode selection comprises selecting transmit only operation, receiving only operation or transmit and receive operation.

11. The system of claim 10 , wherein selecting transmit and receive operation further comprises selecting monostatic transmit and receive mode or bistatic transmit and receive mode.

12. The system of claim 1 , wherein the processing circuitry is further configured to enable the operator to select a processing technique and output to be provided with respect to a received signal received by the RF module.

13. The system of claim 12 , wherein selecting the processing technique and output comprises selecting one or more outputs providing range, Doppler, micro-Doppler, 3D imaging, and inverse synthetic aperture radar.

14. The system of claim 12 , wherein selectively determining the modulation technique and selecting the processing technique comprises selecting high frequency linear chirp in combination with stretch processing.

15. The system of claim 12 , wherein selecting the processing technique comprises employing stretch processing.

16. A method comprising:
generating, by a photonic module, an optical tone for modulation in an optical domain;
converting the optical tone to a radio frequency (RF) domain after the modulation;
interfacing, using an RF module, with the photonic module to receive a transmission signal converted from the optical domain; and
enabling, using processing circuitry, an operator to perform software defined control of the photonic module and the RF module at least with respect to selectively determining a carrier frequency of the optical tone and a modulation technique to be employed with respect to performing the modulation.

17. The method of claim 16 , wherein selectively determining the modulation technique comprises selecting one or more of a waveform, bandwidth, pulse length and repetition frequency to be employed for the modulation.

18. The method of claim 16 , further comprising enabling the operator to perform mode selection via software defined control.

19. The method of claim 16 , further comprising enabling the operator to select a processing technique and output to be provided with respect to a received signal.

20. The method of claim 19 , wherein selectively determining the modulation technique and selecting the processing technique comprises selecting high frequency linear chirp in combination with stretch processing.

Assignees

• Univ Johns Hopkins

Inventors

• Lohr Michele B
• Sova Raymond M
• Dennis Michael L
• Pavek Richard E
• Funk Kevin B

Classifications

• G01S13/02 Primary

  Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems · CPC title

• H04B2210/006

  Devices for generating or processing an RF signal by optical means · CPC title

• H04B10/90

  Non-optical transmission systems, e.g. transmission systems employing non-photonic corpuscular radiation · CPC title

• G01S13/86 Primary

  Combinations of radar systems with non-radar systems, e.g. sonar, direction finder · CPC title

• H04B10/2575

  Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier · CPC title