US 9,429,655 B2Granted

Detecting and localization method of unknown signal using aircraft with ADS-B system

AssigneeKorea Aerospace Research Institute

InventorsYoungsun Yun, Jeongho Cho, Moonbeom Heo, Giwook Nam

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Abstract

A method of detecting an unknown signal and estimating a source location of the unknown signal using aircraft based on an automatic dependent surveillance-broadcast (ADS-B) system is provided. The method includes a first step (S100) for obtaining from a plurality of airborne aircrafts provided with a network system, aircraft signals transmitted to an air traffic control (ATC) and a second step (S200) for detecting, by the ATC, a presence of an unknown signal in the aircraft signals based on one of a time difference of arrival (TDOA) method, a time of arrival (TOA) method, and an angle of arrival (AOA) method. The method further includes a third step (S300) for estimating the source location of the unknown signal and a fourth step (S400) for transmitting unknown signal generation information associated with the unknown signal and the source location of the unknown signal to neighboring aircraft and the ATC.

Claims3

Dependent claims

A method of detecting an interference signal and estimating a source location of the interference signal using network connected aircraft, the method comprising:

obtaining, by airborne aircrafts, GNSS signals transmitted from navigation satellites affected by the interference signal transmitted from the source location of the interference signal, and obtaining, by the airborne aircrafts, jammer to noise ratio (J/N) measurements from the GNSS signals affected by the interference signal;
transmitting, by the airborne aircrafts, from a plurality of airborne aircrafts provided with a network system to an air traffic control (ATC), jammer to noise ratio measurements, through the network;
detecting, by the air traffic control (ATC), a presence of the interference signal by analyzing the J/N measurements;
estimating, by the ATC, the source location of the interference signal using the J/N measurements;
and
transmitting, by the ATC, the source location of the interference signal, to neighboring aircraft and a second ATC through a flight information services-broadcast (FIS-B) or a notice to airmen (NOTAM).

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/517,169Filed 17 Oct 2014 · continuation
Priority: KR 10-2012-013756630 Nov 2012
Published: US 2015/0035699 A15 Feb 2015
Granted: 30 Aug 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G01S 19/21
Receivers: interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
G01S 5/0036
Transmission from mobile station to base station: of measured values, i.e. measurement on mobile and position calculation on base station
G01S 5/0072
Transmission of position information to remote stations: transmission between mobile stations, e.g. anti-collision systems
G01S 5/011
Determining conditions which influence positioning, e.g. radio environment, state of motion or energy consumption: identifying the radio environment

Family

PCT/KR2013/009659Parent of this continuation · filed 29 Oct 2013
US 2015/0035699 A1Pre-grant publication · published 5 Feb 2015
US 9,429,655 B2This patent

From the US filing history. Foreign family members aren’t listed.

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