Lecture_10 - Electronic Combat Systems NS 212 LT Adam...

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Electronic Combat Systems NS 212 LT Adam Sheppard
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Electronic combat “Using electromagnetic energy to determine, exploit, reduce, or prevent enemy use of the electromagnetic spectrum while retaining friendly use” Three major branches: Electronic support Electronic attack Jamming Medium modification Stealth technology Physical destruction Electronic protection
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Electronic support Electronic support is passive sensing of electromagnetic energy through the use of receivers This can often be the first indication of a target’s presence (even well before radar). How can this be? Is there any tactical advantage to be gained in this situation? One way vice two way transmission We know target’s presence before they see us
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Electronic Support Receivers obtain raw data, analyzes it, and turns it into useful information ES receivers differ from ordinary radio wave receivers both in design and auxiliary equipment associated with it
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Electronic support Early warning / sensing of target presence The key is signal attenuation. Signal can reach us, but cannot return to the target.
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Electronic support requirements: Receiver must be versatile and be able to survey a broad bandwidth since enemy frequency bands are not known beforehand Must be able to process strong and weak signals Must have narrow bandpass for frequency ID (unwanted signal rejection) Must be able to compute where signal comes from (triangulation) Must be able to perform signal analysis of the received signal – why is that important?
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There’s lots of RF out there. How will the receiver know to trigger an alarm? How will it physically do this? Through filtering of the received signal Terms: Bandwidth: range of detectable frequencies Receiver sensitivity: minimum power able to be detected
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  • Spring '14
  • Wavelength, Electromagnetic spectrum, Electronic Combat Systems

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