System and method for adaptive broadcast radar system

• US 7,277,045 B2
• Filed: 05/23/2006
• Issued: 10/02/2007
• Est. Priority Date: 11/28/2000
• Status: Expired due to Term

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: Budic, Robert D.
• Primary Examiner(s): Lobo; Ian J.
• Application Number:
  US11/419,979
• Publication Number:
  US 20060227042A1
• Time in Patent Office: 497 Days
• Field of Search: 342/90, 342/159, 342/195
• US Class Current: 342/90
• CPC Class Codes: G01S 13/003 Bistatic radar systems; Multistatic radar systems
• CPC Class Codes: G01S 13/288 phase modulated
• CPC Class Codes: G01S 13/524 based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi
• CPC Class Codes: G01S 13/5242 with means for platform motion or scan motion compensation, e.g. airborne MTI
• CPC Class Codes: G01S 13/878 Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector G01S13/874 takes precedence
• CPC Class Codes: G01S 2013/0245 Radar with phased array antenna
• CPC Class Codes: G01S 5/12 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
• CPC Class Codes: G01S 7/003 Transmission of data between radar, sonar or lidar systems and remote stations
• CPC Class Codes: G01S 7/023 Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques auxiliary means for detecting or identifying radar signals or the like G01S7/021; means for anti-jamming G01S7/36
• CPC Class Codes: G01S 7/0236 Avoidance by space multiplex
• CPC Class Codes: G01S 7/288 Coherent receivers
• CPC Class Codes: G01S 7/292 Extracting wanted echo-signals
• CPC Class Codes: G01S 7/352 Receivers

Abstract

A method for obtaining target parameters within an adaptive broadcast radar system. In one embodiment, the method includes: coding information about a signal waveform generated by a transmitter having sub-apertures; receiving a signal at a receiver having sub-apertures corresponding to the sub-apertures of the transmitter, wherein the received signal correlates to the signal waveform; decoding information about the signal waveform from the received signal; and, determining a data quad from the decoded information, wherein the data quad includes degrees of freedom associated with the transmitter.

Claims

1. A method for obtaining target parameters within an adaptive broadcast radar system, comprising:

coding information about a signal waveform generated by a transmitter having sub-apertures;

receiving a signal at a receiver having sub-apertures corresponding to said sub-apertures of said transmitter, wherein said received signal correlates to said signal waveform;

decoding information about said signal waveform from said received signal; and

determining a data quad from said decoded information, wherein said data quad includes degrees of freedom associated with said transmitter.

2. The method of claim 1, further comprising generating said signal waveform within said sub-aperture of said transmitter.

3. The method of claim 1, further comprising applying a phase shift to said signal waveform within said transmitter sub-apertures.

4. The method of claim 3, further comprising applying a weight vector to said signal waveform within said transmitter sub-apertures.

5. The method of claim 4, further comprising motion compensating said received signal by removing said weight vectors and said phase shifts.

6. The method of claim 1, wherein said received signal is a composite of transmitted signal from said signal waveform.

7. The method of claim 1, further comprising generating a channel transfer function comprising delay and doppler signal components of said received signal.

8. The method of claim 7, wherein said determining includes formatting said channel transfer function with a weight vector and measurement covariance of said received signal.

9. The method of claim 8, wherein said signal waveform is transmitted as an orthogonal waveform.