Day 1: EA Flashcards
A disturbance that affects an electrical circuit due to either electromagnetic induction or electromagnetic radiation emitted from an external source
Electromagnetic Interference (EMI)
Involves the use of the electromagnetic spectrum (EM spectrum) to attack enemy target systems
Electromagnetic Attack (EA)
Examples of EA
- Jamming communication signals or radar systems
- Spoofing
False information is fed to the enemy’s systems
Spoofing
Phenomenon that occurs when two or more waves combine to form a resultant wave
Interference
Enhance the strength of a signal
Constructive Interference (in phase)
Can also increase the strength of friendly signals
Constructive Interference (in phase)
Reduce the fidelity of enemy signals
Destructive Interference (out of phase)
Support offensive military operations
Offensive EA
Protect friendly forces from adversary attacks
Defensive EA
Aim is to disrupt or deny the usage of a communication link or a detection system
Jamming
What are the two categories of jamming?
- Active
- Passive
Emitting signals to interfere with a target’s operation
Active Jamming
Techniques such as chaff or decoys to confuse the enemy’s systems
Passive Jamming
False information is introduced into the enemy’s systems, causing them to react to an incorrect situation
Spoofing
Different from jamming in that it doesn’t just deny the use of a system, but actively misleads it
Spoofing
Applications of Spoofing
- Creating false targets
- Sending incorrect location data
- Injecting false information into enemy communication networks
Factors in EA
- Power
- Frequency
- Modulation
- Target System Characteristics
Military EA
- Communication Jamming
- Radar Jamming and Spoofing
- Navigation Interference
- Information Warfare
What kind of interference can be used to boost the strength of a signal?
Constructive
What kind of interference can be used to weaken or completely nullify a signal?
Destructive
As a jammer, you want to ____ a target signal’s Eb/No in order to disrupt/deny.
Lower
A higher BER means what?
That the desired signal is highly distorted because of bit errors
As a jammer, you want to ____ a target signal’s BER in order to disrupt/deny.
Raise
What are the types of systems used for EA?
- Dedicated Jamming Systems
- Integrated Self-Protection Systems
- Stand-Off Jamming Systems
Identify
Disrupt enemy radar and communication systems from a distance
Stand-Off Jamming Systems
Identify
Use high-power jammers to protect their signals over long distances, and they may be capable of jamming multiple frequencies at once to disrupt a wide range of enemy systems
Stand-Off Jamming Systems
What are they key RF components required for EA?
- Control System
- Antenna
- Power Amplifier
- Power Supply
- Signal Generator
