BI-STATIC RADAR SYSTEM

• US 20180024233A1
• Filed: 07/07/2016
• Published: 01/25/2018
• Est. Priority Date: 08/28/2015
• Status: Active Grant

• Current Assignee: Aptiv Technologies AG
• Original Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Inventors: SEARCY, JAMES F., ROSSITER, RYAN K., ALLAND, STEPHEN W.
• Granted Patent: US 10,641,881 B2
• Time in Patent Office: Days
• CPC Class Codes: G01S 13/003 Bistatic radar systems; Multistatic radar systems
• CPC Class Codes: G01S 13/87 Combinations of radar systems, e.g. primary radar and secondary radar
• CPC Class Codes: G01S 7/006 using shared front-end circuitry, e.g. antennas G01S13/765, G01S13/825 take precedence
• CPC Class Codes: G01S 7/032 Constructional details for solid-state radar subsystems
• CPC Class Codes: G01S 7/4008 of transmitters

Abstract

A bi-static radar system configured for coherent detection of a radar-signal includes a plurality of radar-transceivers, a controller, and a communications device. The plurality of radar-transceivers is characterized as physically spaced apart with respect to each other. The controller is in communication with the each of the radar-transceivers and is configured to coherently operate each of the radar-transceivers. The communications device communicates both a reference-clock signal and a frame-sync signal from the controller to each of the plurality of radar-transceivers whereby the plurality of radar-transceivers operate coherently. Alternatively, the system may include a reference-signal generator, a transmitter, and a plurality of receivers. The reference-signal generator generates a reference-signal characterized by a reference-frequency proportional to a fraction of a radar-frequency of a radar-signal transmitted. The transmitter generates the radar-signal at the radar-frequency based on the reference-signal. The plurality of receivers operates coherently to detect the radar-signal based on the reference-signal.

Claims

1. A bi-static radar system configured for coherent detection of a radar-signal, said system comprising:

a plurality of radar-transceivers, said plurality of radar-transceivers characterized as physically spaced apart with respect to each other;

a controller in communication with the each of the radar-transceivers, said controller configured to coherently operate each of the radar-transceivers; and

a communications device configured to communicate both a reference-clock signal and a frame-sync signal from the controller to each of the plurality of radar-transceivers whereby the plurality of radar-transceivers operate coherently.

2. A bi-static radar system configured for coherent detection of a radar-signal, said system comprising:

a reference-signal generator operable to generate a reference-signal characterized by a reference-frequency that is proportional to a fraction of a radar-frequency of a radar-signal transmitted by the system;

a transmitter operable to generate the radar-signal at the radar-frequency based on the reference-signal; and

a plurality of receivers operable to coherently detect the radar-signal based on the reference-signal.

3. The system in accordance with claim 2, wherein the plurality of receivers includes as a first receiver and a second receiver spaced apart from the first receiver.

4. The system in accordance with claim 3, wherein the first receiver is spaced apart from the second receiver by more than five-hundred-millimeters (500 mm).