# US 10,371,792 B2 · System and method for providing remote target identification using radiofrequency identification

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- Number: US 10,371,792 B2
- Document ID: US10371792B2
- Status: Granted
- Kind: B2
- Application number: 14/802,517
- Filed: 2015-07-17
- Published: 2017-01-19
- Granted: 2019-08-06
- Earliest claimed: 2015-07-17
- Assignees: Raytheon Command and Control Solutions LLC
- Applicants: Thales-Raytheon Systems Company LLC
- Inventors: James W. Rakeman; David E. Stephens; Thomas W. Miller
- Web page: https://patentgrep.com/patent/US10371792B2

## CPC

- G01S 7/003: {Transmission of data between radar, sonar or lidar systems and remote stations}
- G01S 13/00: Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S 13/42: Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S13/46)
- G01S 13/66: Radar-tracking systems; Analogous systems
- G01S 13/74: Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S 13/86: Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
- G01S 17/74: Systems using reradiation of electromagnetic waves other than radio waves, e.g. IFF, i.e. identification of friend or foe
- G06K 7/10366: {the interrogation device being adapted for miscellaneous applications}
- H04B 10/502: {LED transmitters}
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- H04B: TRANSMISSION

## Abstract

A system for providing remote target identification is provided that includes a radar system and an electro-optical detector. The radar system is configured to locate a remote target. The electro-optical detector is configured to detect an optical signal transmitted from the target when the target is located. The optical signal includes identifying data for the target.

## Claims

### Claim 1

A system for providing remote target identification, comprising:
a radar system configured to:
generate and transmit a radar signal to a target;
locate the target using the radar signal; and
generate a target location where the target is located; and
an electro-optical detector that is co-mounted and north-aligned with the radar system, the electro-optical detector configured to:
receive the target location from the radar system;
detect an optical signal transmitted by the target, wherein the optical signal is transmitted by the target in response to reception of the radar signal, and wherein the optical signal comprises identifying data for the target;
determine an identity and a status of the target based on the identifying data for the target; and
provide the identity and status of the target to the radar system.

### Claim 2 (depends on 1)

The system of claim 1, wherein the electro-optical detector is further configured to decode the optical signal to extract the identifying data.

### Claim 3 (depends on 1)

The system of claim 1, wherein the status indicates whether the target is friendly.

### Claim 4 (depends on 1)

The system of claim 1, wherein the optical signal is transmitted from an optical transmitter of the target, and wherein the optical transmitter comprises a light-emitting diode.

### Claim 5 (depends on 1)

The system of claim 1, wherein the electro-optical detector is further configured to attempt to detect a second optical signal from a second target and to determine a status of the second target based on a failure to detect the second optical signal from the second target.

### Claim 6 (depends on 1)

The system of claim 1, wherein the radar system is further configured to notify the electro-optical detector of the target location.

### Claim 7 (depends on 1)

The system of claim 1, wherein the target comprises an unmanned aerial vehicle (UAV).

### Claim 8 (depends on 1)

The system of claim 1, wherein the radar signal comprises an interrogation waveform generated by a waveform generator.

### Claim 9 (depends on 1)

The system of claim 1, wherein the radar system further comprises a high-power amplifier.

### Claim 10 (depends on 1)

The system of claim 1, wherein the radar signal is configured to be detected by a radio frequency identification (RFID) antenna at the target.

### Claim 11

A method for providing remote target identification, comprising:
generating, by a radar system, a radar signal;
transmitting, by the radar system, the radar signal to a target;
locating, by the radar system, the target using the radar signal;
generating, by the radar system, a target location where the target is located;
receiving, by an electro-optical detector, the target location from the radar system, wherein the electro-optical detector is co-mounted and north-aligned with the radar system;
detecting, by the electro-optical detector, an optical signal transmitted by the target, wherein the optical signal is transmitted by the target in response to reception of the radar signal, and wherein the optical signal comprises identifying data for the target;
determining, by the electro-optical detector, an identity and a status of the target based on the identifying data for the target; and
providing, by the electro-optical detector, the identity and status of the target to the radar system.

### Claim 12 (depends on 11)

The method of claim 11, wherein the electro-optical detector is further configured to decode the optical signal to extract the identifying data.

### Claim 13 (depends on 11)

The method of claim 11, wherein the status indicates whether the target is friendly.

### Claim 14 (depends on 11)

The method of claim 11, wherein the optical signal is transmitted from an optical transmitter of the target, and wherein the optical transmitter comprises a light-emitting diode.

### Claim 15 (depends on 11)

The method of claim 11, wherein the electro-optical detector is further configured to attempt to detect a second optical signal from a second target and to determine a status of the second target based on a failure to detect the second optical signal from the second target.

### Claim 16 (depends on 11)

The method of claim 11, wherein the radar system is further configured to notify the electro-optical detector of the target location.

### Claim 17 (depends on 11)

The method of claim 11, wherein the target comprises an unmanned aerial vehicle (UAV).

### Claim 18 (depends on 11)

The method of claim 11, wherein the radar signal comprises an interrogation waveform generated by a waveform generator.

### Claim 19 (depends on 11)

The method of claim 11, wherein the radar system further comprises a high-power amplifier.

### Claim 20 (depends on 11)

The method of claim 11, wherein the radar signal is configured to be detected by a radio frequency identification (RFID) antenna at the target.