final ew ppt
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ELECTRONIC WARFARE
ByADITYA PV
INTRODUCTION
Action involving use of the electromagnetic spectrum
Three main divisions :
► Electronic Attack (EA) ► Electronic Protection (EP) ► Electronic Warfare Support (ES)
ELECTRONIC ATTACK (EA)
Promote Uncertainty Use of active and passive energy to “attack “Four Classes of EA
Jamming Modifiers Radar-absorbing materials (RAM) Physical Destruction
NON-DESTRUCTIVE EADENIAL:
Overload opposition’s receiver to deny its use by the enemy by JAMMING, CHAFF and FLARES
DECEPTION:
Create false image or change image’s characteristics on a radar display. Misleads or “spoofs” by using repeaters, transponders, chaff-disguise, radar decoys, blip enhancers and radar cross section (RCS) modification
NOISE JAMMING
Deliberate impairing of enemy’s devices radiation, re-radiation, or reflection of electromagnetic energy
TGT Freq
True Noise
Ideal Jammer
Actual Spot Jammer
CHAFF CORRIDORS
FLARES (ACTIVE)
CHAFF FALSE TARGETS
Real Target
MULTIPLE FALSE TARGETS
STROBES COVER PULSE JAMMING
X
“Reactive Jamming”
DECOYS
VELOCITY GATE PULL OFF (VGPO)
Target Return
Velocity Gate
Gate Pull-Off
DESTRUCTIVE EA
Anti-Radiation Missiles SLAM HARM Sidewinder
Directed Energy
SLAMER(Stand-off Land Attack Missile-
Expanded Response)
HARM(HIGH-SPEED ANTI RADIATION MISSILE)
SIDEWINGER
ELECTRONIC PROTECTION (EP)
Protection of friendly combat capability against undesirable effect of friendly or enemy employed EW
Types Passive EW Active EW
EPThree ways to defend from enemy EW
Modify radar o Make it more complex o Make it harder to jam
Modify the Medium o Chaffo Torch
Modify the platform
EP FACTORS
BURNTHROUGH: Increase signal strength to overpower
jammer noise (ECCM)Emission Control (EMCON)
AlphaBravo CharlieDelta
Operator Recognition Training
JAMMING EFFECTIVENESS
Match the victim radar’s RFBe continuousHave sufficient power
METHODS TO DEFEAT DIRECT THREAT JAMMING
Frequency Techniques RF Change RF Diversity RF Agility Diplexing
Variable PRF
ELECTRONIC WARFARE SUPPORT (ES)
Passive surveillance of the EM spectrum ► Detection ► Tracking ► Recognition ► Targeting ► Warning ► Destruction ► Avoidance
PASSIVE DETECTION RADAR
IFF
TACAN
JAMMING
ES(PASSIVE SURVEILLANCE)
ELINT : Electronic Intelligence
COMINT : Communications Intelligence
ES(RECEIVER DESIGN REQUIREMENTS)
Wide spectrum surveillanceWide dynamic rangeUnwanted signal rejectionAngle-of-Arrival measurementSignal Analysis capabilityReal-Time DisplayRecording System
AN EXAMPLEOF
U.S. SHIP BOARD EWCAPABILITIES
• SLQ-32 “Sidekick”– On all combatants– Radar warning, detection and jamming– Uses internal library to auto detect/categorize
• Infrared Flares – On all combatants
• Chaff – On all combatants
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