ABSTRACT
An encrypted laser
friend-foe identification technology to query potential targets as to their
battle field affiliation and also to identify itself as a friend to a potential
attacker. The IFF System sends a narrow laser beam to the potential target
which is accompanied or closely followed by a radio frequency (RF) wave
modulated with encrypted identification information. If the potential target is
also equipped with IFF System and in possession of the valid code, then the
received RF wave can be decrypted to reveal the potential attacker as a friend.
The potential target, then, encrypts its own identification information using
the same code and transmits it via RF wave to the potential attacker. This
feedback signal creates a buzzer to buzz else if there is no feedback signal
buzzer does not buzz.
INTRODUCTION
1.1 GENERAL
In military, soldier
points a laser beam on to the body armor of foe soldier and trigger the gun. In
such cases miscommunication may occur, during night time battle firing. So that
friendly soldier may die or it may cause severe injure due to aggressive
battle.
1.2
AIM OF PRESENT STUDY
To avoid miscommunication or
misinterpretation during firing.
1.3
STUDY AREA
The study area is mainly to know the
working of RF transmitter and RF receiver circuits. Features of PIC
microcontroller and parallel TX RX is used.
1.4 OBJECTIVE
AND SCOPE OF THE PROJECT
1. An
identification-Friend-or-Foe System (IFF System) technology to query potential
targets as to their battle field affiliation and also to identify itself as a
friend to a potential attacker.
2. The
IFF System sends a narrow laser beam to the potential target which is
accompanied or closely followed by a radio frequency (RF) wave modulated with
encrypted identification information.
3. If
the potential target is also equipped with IFF System and in possession of the
valid code, then the received RF wave can be decrypted to reveal the potential
attacker as a friend.
4. The
potential target, then, encrypts its own identification information using the
same code and transmits it via RF wave to the potential attacker.
1.5 HISTORICAL BACKGROUND
The inspiration for the project is
derived from Identification Friend-or-Foe (IFF) transponder systems currently used
on fighter aircraft and military vehicles. Fighter aircraft fitted with an IFF
system transmit a coded radio (RF) message to other aircraft detected within a
pre-set range. Friendly aircraft can decrypt the RF message and provide a
correctly encrypted response to prevent fratricide
1.6 METHODOLOGY
The project is
carried out in following phases
- Design of block diagram as per the requirement.
- Design of RF transmitting and receiving circuits.
- Simulation using the software MICRO C.
- Implementation and testing of circuits in general purpose PCB.
- Design of printed PCB and testing.
1.7 SOURCES OF INFORMATION
The
sources of information were basically from the IEEE papers, articles published
in electrical papers, published thesis [1] and information about the subject
from our project guide. Any further information needed for the project were
taken from the internet sites like Wikipedia, journals. Elsevier and other
useful information sites. http://www.automationdirect.com/static/specs/peselection.pdf
1.8 ORGANIZATION OF THE CHAPTERS
Chapter 1 Introduces
the main purpose of our project. This chapter gives a brief explanation of the
aim of present study, study area, objective, methodology, sources of
information and outlines the contents of the upcoming chapters.
Chapter 2 Deals
with working of RF transmitter and RF receiver circuits used.
Chapter 3 Deals
with details of hardware, different components used, flowchart of the transmitter and receiver
part of the PIC microcontroller and the experimental set up of the model. .
Chapter 4 Deals
with the discussion of the result.
Chapter5 Deals
with advantages and limitations derived from the relevant Studies.
Chapter 6 Deals
with the conclusion and future scope.
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