Enhanced passive coherent location techniques to track and identify UAVs, UCAVs, MAVs, and other objects
First Claim
Patent Images
1. A system for tracking an object, comprising:
- a receiver receiving a reference transmission on a direct path from a controlled or uncontrolled transmitter, and a scattered transmission originating from a controlled or uncontrolled transmitter, scattered by the object, and then received by the receiver;
a comparator comparing the received transmissions to determine a frequency-difference-of-arrival thereby establishing a track or tracks for the object or objects, the comparator comprising a subsystem for narrowband pre-detection signal processing receiving input signals include the target transmission and the reference transmission, and correlating the target transmission and the reference transmission using a database of a priori illuminator signals to discriminate between reference transmissions and target transmissions; and
a tracker updating each track on a predetermined periodic basis, and forwarding each track to the system'"'"'s processing unit for filtering and display.
4 Assignments
0 Petitions
Accused Products
Abstract
A system and technique is described which has the capability to track and identify, in real time, various aircraft and objects including Unmanned Aerial Vehicles (UAVs), Unmanned Combat Aerial Vehicles (UCAVs), and Micro Aerial Vehicles (MAVs). The system uses a combination of techniques including conventional automatic dependent surveillance broadcast (ADS-B), transponder multilateration, broadband emitter multilateration, primary and secondary radar, and passive coherent location. A series of enhancement to conventional passive coherent location are described.
-
Citations
8 Claims
-
1. A system for tracking an object, comprising:
-
a receiver receiving a reference transmission on a direct path from a controlled or uncontrolled transmitter, and a scattered transmission originating from a controlled or uncontrolled transmitter, scattered by the object, and then received by the receiver; a comparator comparing the received transmissions to determine a frequency-difference-of-arrival thereby establishing a track or tracks for the object or objects, the comparator comprising a subsystem for narrowband pre-detection signal processing receiving input signals include the target transmission and the reference transmission, and correlating the target transmission and the reference transmission using a database of a priori illuminator signals to discriminate between reference transmissions and target transmissions; and a tracker updating each track on a predetermined periodic basis, and forwarding each track to the system'"'"'s processing unit for filtering and display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification