# US 2021/0241640 A1 · Method of analyzing a ground-based augmentation system signal and test system for testing a ground-based augmentation system

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- Number: US 2021/0241640 A1
- Document ID: US20210241640A1
- Status: Published application
- Kind: A1
- Application number: 16/917,357
- Filed: 2020-06-30
- Published: 2021-08-05
- Earliest claimed: 2020-01-30
- Assignees: Rohde & Schwarz GmbH & Co. KG
- Applicants: Rohde & Schwarz GmbH & Co. KG
- Inventors: Klaus Theissen
- Web page: https://patentgrep.com/patent/US20210241640A1

## CPC

- G01S 19/071: {DGPS corrections}
- G01S 19/03: Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
- G01S 19/073: {involving a network of fixed stations}
- G01S 19/074: {providing integrity data, e.g. WAAS}
- G01S 19/243: {Demodulation of navigation message}
- G01S 19/252: {Employing an initial estimate of location in generating assistance data}
- G01S 19/34: Power consumption
- G08G 5/26: Transmission of traffic-related information between aircraft and ground stations
- G08G 5/54: for approach or landing
- G08G 5/55: for a single aircraft
- G01S 19/15: Aircraft landing systems
- G06F 18/214: Generating training patterns; Bootstrap methods, e.g. bagging or boosting
- 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
- G08G: TRAFFIC CONTROL SYSTEMS (guiding railway traffic, ensuring the safety of railway traffic B61L; arrangement of road signs or traffic signals E01F9/00; radar or analogous systems, sonar systems, lidar systems specially adapted for traffic control G01S13/91, G01S15/88, G01S17/88; {radar or analogous systems, sonar systems, lidar systems specially adapted for anti-collision purposes G01S13/93, G01S15/93, G01S17/93})
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A method of analyzing a ground-based augmentation system (GBAS) signal, comprising: transmitting at least one GBAS message burst; receiving the GBAS message burst, and performing a power measurement at symbol times of the GBAS message burst. Further, a test system for testing a ground-based augmentation system is described.

## Claims

### Claim 1

A method of analyzing a ground-based augmentation system (GBAS) signal, the method comprising:
transmitting at least one GBAS message burst;
receiving the GBAS message burst; and
performing a power measurement at symbol times of the GBAS message burst.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the power measurement is performed over the entire length of the GBAS message burst.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the GBAS message burst encompasses a training sequence and application data following the training sequence in time.

### Claim 4 (depends on 1)

The method according to claim 1, wherein a GBAS signal is transmitted that comprises the at least one GBAS message burst, and wherein the GBAS signal is received and decoded.

### Claim 5 (depends on 4)

The method according to claim 4, wherein the GBAS signal comprises several frames, wherein each frame is assigned to eight time slots, and wherein the at least one GBAS message burst transmitted is transmitted within one of these time slots.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the GBAS message burst is assigned to a Very High Frequency Data Broadcast signal.

### Claim 7

A test system for testing a ground-based augmentation system (GBAS), the test system comprising a GBAS test transmitter, a GBAS test receiver and a control and/or evaluation circuit, wherein the GBAS test transmitter is configured to transmit a GBAS message burst, wherein the GBAS test receiver is configured to receive the GBAS message burst, and wherein the control and/or evaluation circuit is configured to perform a power measurement at symbol times of the GBAS message burst.

### Claim 8 (depends on 7)

The test system according to claim 7, wherein the control and/or evaluation circuit and the GBAS test receiver are integrated in a testing device.

### Claim 9 (depends on 8)

The test system according to claim 8, wherein the testing device is a handheld device or a portable device.

### Claim 10 (depends on 9)

The test system according to claim 9, wherein the testing device is a battery-powered testing device.

### Claim 11 (depends on 7)

The test system according to claim 7, wherein the GBAS test transmitter is established by a GBAS transmitter of the ground-based augmentation system to be tested.

### Claim 12 (depends on 7)

The test system according to claim 7, wherein the GBAS test receiver is established by a GBAS receiver of an airplane of the ground-based augmentation system to be tested.