This document discusses the implementation of an aircraft position and identification tracking system using GPS and a PRIB (Practical Aircraft Reporting Identification Beacon) device in MATLAB. It describes the need to track aircraft without relying on transponders that can be turned off. The system uses GPS to determine the aircraft's position and GMSK modulation to transmit identification and location data via the PRIB device. MATLAB is used to simulate the system due to its signal processing and communications toolboxes and ability to define custom functions.

1. Implementation of a Practical Aircraft Position andImplementation of a Practical Aircraft Position and
Reporting Identification Beacon (PRIB) in MATLABReporting Identification Beacon (PRIB) in MATLAB
www.Fullinterview.comwww.Fullinterview.com

2. Under the guidance ofUnder the guidance of
RAJESWARI MADAMRAJESWARI MADAM
Under the supervision ofUnder the supervision of
Mrs. I. SuneethaMrs. I. Suneetha (H.O.D)(H.O.D)
DEPARTMENT
ELECTRONICS AND COMMUNICATION

3. INTRODUCTION :
•This project details the specifications, hardware and software
design, and implementation of an aircraft tracking system
using the Global Positioning System (GPS).
Problem with conventional Transponder:
•A transponder is a device that is used for tracking aircraft by
mean of a secondary radar system, but it can be turned off
deliberately, and it is an expensive item for small aircraft. The
consequence of which is the terrorist attack on September
11th,WTC.

4. Modules:Modules:
• Aviation Surveillance
• Global Positioning System and GMSK
• Tracking through PRIB
• Implementation of Matlab code

5. Aviation Surveillance:
•Aircraft surveillance means tracking the Aircraft
continuously. This falls into three categories: primary radar,
secondary radar, and satellite based systems.
Global Positioning System and Modulation
•Global Positioning System consists both the Transmitter and
Receiver which can be used for the tracking of Aircraft. For
this we need an efficient modulation scheme such as the
Gaussian Minimum Shift Keying (GMSK).

6. Aviation SurveillanceAviation Surveillance
• Primary RADAR:
This is based on the fact that objects reflect radio
waves. Primary radars emit high power RF
energy and detect the presence of an aircraft by
detecting the energy reflected back by the
target.
• Secondary Surveillance RADAR:
is a combination of radar and a communication
system. In contrast to primary radar, secondary
radar does not use the passive echo reflected
from a target, but uses an active transponder,
which is located in the target aircraft.

7. SSR signal format:SSR signal format:

8. • Satellite based system:
Automatic Dependent Surveillance Broadcast
(ADS-B) is a new satellite based technology that
allows aircraft to broadcast information such as
identification, position, and altitude.
This requires a Global Positioning System

9. Transponder types:Transponder types:

10. Mode S TransponderMode S Transponder
• continuous growth in the number of aircraft has
triggered the development of the Mode S
transponder.

11. Global positioning system:Global positioning system:

12. The GPS system is divided into three major components
• The Space Segments
• The User Segment
• The Control Segment
The space segment :
consists of 24 operational satellites in six circular
orbits 20200 km above the Earth at an inclination
angle of 55 deg with a 12-hour period.

13. The User Segment :
consists of all earth-based GPS receivers that
allow users to receive the GPS satellite
broadcasts and compute their precise position,
velocity, and time.
The control segment:
consists of a master control station.

14. PRIB SystemPRIB System ::

15. GMSK:GMSK:
• Gaussian Minimum Shift Keying (GMSK) is a
digital modulation for sending high-speed data in
narrow band frequency modulation (FM) radio
channels. In GMSK, the phase of the carrier is
continuously varied by an antipodal signal, which
has been shaped by a Gaussian filter.

16. Gaussian filter characteristics:Gaussian filter characteristics:

17. MATLAB:MATLAB:
• Definition
• Uses
• Applications
• Features

18. Available Tool boxes:Available Tool boxes:
• Signal processing
• Image processing
• Control systems
• Neural Networks
• Communications
• Robust control
• Statistics

19. Why only MAT LAB simulation ?Why only MAT LAB simulation ?
• This is a library that allows you to write C
and Fortran programs that interact with
MATLAB.
• Highly user interactive
• More mathematical functions are readily
available
• There is an ability to define one’s own
functions.

20. Thank YouThank You