practical considerations involved in the design of modern naval … europe 2017... · 2017. 7....

© 2011 by Elbit Systems | Elbit Systems Proprietary© 2017 by Elbit Systems | Elbit Systems Proprietary1

AOC EW Europe 2017June 2017

(The Olympia London)

Practical Considerations Involved in the design of Modern Naval EW Systems

A Modular Scalable Approach

EWEU 03042017 Unclassified03/04/2017


Presentation Outline

The role of Naval EW Systems and their evolution

Latest EW Challenges

Breeding Process of an EW System

Main required capabilities and resulting contradictions

Practical approach

Holistic modular solutions and capabilities



Elbit Systems

EW and SIGINT – ELISRA

Yaakov Siman Tov


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© 2011 by Elbit Systems | Elbit Systems Proprietary© 2017 by Elbit Systems | Elbit Systems Proprietary4 03/04/2017

EW Role in latest naval combatants

Building EM Situation

Awareness

(EOB Picture)

EA

(Degrading opponents EOB)

Complementary Intelligence

Sensor

Unclassified

Ship Self Defense

Legacy System’s main goal



Latest Challenges


Littoral

Advanced

RadarsMaritime

Assets

Protection

High EM

Density

Highly

Lethal

Missiles

Situation Awareness

Asymmetric

Threats

Scenario Challenges

InteroperabilityInterference

Immunity

Advanced EA

Wider

Frequency

Coverage

High Capacity

Data fusion

100% POI (Time/ Freq.) Combined

with High Selectivity

Advanced Self

Protect ECM

Advanced

Signal Analysis

EW System Challenges


Breeding of a new EW System

Unclassified

Operational

Challenge

Operational

Requirement

Budget

Feasibility

Industry Customer

• System goal / Complexity

• Performance

• Configuration

• Budget

• Schedule


Compromises


EW Suite

RWR/ESM

SA / SP/ EA

ESM

RWR

SA / SP

Main System Capabilities

Higher sensitivity

Higher Dynamic Range

Higher Frequency measurement resolution

Extended frequency coverage

Instantaneous jamming capability of various radars

Higher frequency immunity

Dilemma:

The required capabilities contradict each other !


RWR

SP

SA – Situation Awareness

SP – Self Protection


Main Contradictions


Extended Freq. Coverage

Extended Sensitivity &

Dynamic Range

Detection of LPI Radars & Side Lobes

Range Extension, SEI

Simultaneous coping if strong and

weak emitters

Handling of wider scope of radars and

radar types

Higher pulse density

Enhanced interferences susceptibility

(onboard and external signals)

Specification Operational Motivation Outcome

Jamming & Detection

of Modern Radars

Coherent Jamming

(Rx. dependent )Copping with Complex Signals

Wider Instantaneous

Frequency Coverage

Modern Radars tendency of transmitting

signals scattered over wider frequencies

Wider instantaneous frequency

coverage for digital receivers & ECM

Exciters

Higher ERPCoping with Modern Radars improved

processing gainDesire for higher ERP transmitter

with higher reliability and availability


System Holistic Challenges


RWR


Practical Approach

Employ a bank of common building blocks for all

system types / variants

Modular scalable architecture

Apply flexible interfaces between own system and

other onboard subsystems

Tailoring the right solution – Avoid over / under

specifications (dialog with customer)



Holistic Operational Solution

Treating all mission elements by proper synthesis of:

Arena,

Engagement scenario,

Ship mission

Dynamic allocation of ship’s EW System resources.


While taking into account:

Optimized interference

handling

And also:

Scalability, affordable price, reasonable provisioning

time, reliability and availability


Holistic Modular Scalable Process

ECM TG.

ESM Response

Raw ECM

Data/Signals

HMI Indications

Reports to C&C

Reports to CMDS

Rx. Sampling &

Measurement

EW Processor

Raw IFMulti-bit

PDWs

Mono-bit

PDWs

WBR/DF Rx.DF/ Rx. NBR / DF Rx.

Rx. SignalsRx. Signals Rx. Signals

ECM

DesignationsELINT

Processor



Scope of Cost Effective Naval EW Solutions

Antenna Arrays

ESM / DF

Receivers

RWR Cost Effective ESM System

Receiver

Processor



Cost Effective Naval RWR Solution

Mono Pulse

Amplitude DF

Processor

Omni

Directional

Array

NBR

Multi-Bit

MonoBit

Signal

ProcessingDetection, Identification, Warning

Ship

InterfacesRWR

Display

Missiles, Ship-borne & Airborne radars,

Friendly, hostile & Neutral Emitters

Interference signals

Input Signals

System Outputs

ESM/ECM Digital Processor



Holistic High Level Solution (ESM/ELINT/SP/EA Suite)

ESM/ECM Digital Processors



Frequency Measurement Accuracy

Legacy IFMDigital Receiver

Digital Receiver accuracy vs SNR & PW

High Frequency Measurement Accuracy is obtained even at low SNR

Further higher sensitivity is gained at wider pulses



Holistic Elisra Solution

Full ESM, ECM Suit

Wide frequency

coverage 0.5 to 40 GHz

Combined NBR & WBR

Receivers

Combined DF

Techniques

Advanced Data &

Signal Processing

Digital Receivers

Advanced ECM

(SP & EA) Techniques

High ERP

Interference handling



Thank You
