# Lesson 37 — Modern Trends in EW

<p class="block-synopsis">Four trends are breaking the assumptions a route is built on. Cognitive EW senses, learns and adapts faster than a threat library can be reprogrammed; an ML emitter classifier is only as good as its confusion matrix, read as P<sub>d</sub> and P<sub>fa</sub>; a GPS jammer denies a circle whose radius grows as √ERP, and inside it the INS drifts; and space EW turns on geometry — uplink jamming needs the satellite's beam, downlink jamming is local. Pick one for your Final Project's Limitations section.</p>

<div class="block-toc">
  <a class="bt-card bt-reading" href="L37_ModernTrendsInEW_Reading.html">
    <span class="bt-kind">Reading</span>
    <h4>Modern Trends in EW</h4>
    <p>The cognitive-EW loop, reading a classifier's confusion matrix the L8 way, the GPS denial radius and INS drift on a denied leg, and uplink versus downlink jamming.</p>
  </a>
  <a class="bt-card bt-flashcards" href="L37_Flashcards.html">
    <span class="bt-kind">Flashcards</span>
    <h4>Review deck</h4>
    <p>Key terms and relations from the lesson, in a self-test deck.</p>
  </a>
  <a class="bt-card bt-preflight" href="L37_Preflight.html">
    <span class="bt-kind">Pre-flight</span>
    <h4>Pre-flight quiz</h4>
    <p>Five questions to work before class — anyone can be called to the board.</p>
  </a>
  <a class="bt-card bt-slides" href="../decks/L37_ModernTrendsInEW.html" target="_blank" rel="noopener">
    <span class="bt-kind">Slides</span>
    <h4>Lesson slides</h4>
    <p>The deck we work through in class — an HTML deck you can annotate in the browser, with a print view for saving a PDF.</p>
  </a>
</div>
