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lecture16 - Lecture 16 Outline Announcements Two more...

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Unformatted text preview: Lecture 16 Outline Announcements Two more HWs (posted this week and next) Final exam details next week – practice finals will be posted then also. Remaining lectures on digital modulation Course summary and advanced topics: March 9 ~12:15-12:45 w/pizza? Review of Last Lecture FM Generation and Detection Baseband Modulation PSD and Bandwidth Pulse Shaping Passband Modulation Review of Last Lecture Introduction to Angle Modulation and FM Modulated signal is s(t)=A c cos( θ (t)), θ (t)=f(m(t)) Standard FM: θ (t)=2 π f c t+2 π k f ∫ m( τ )d τ FM Bandwidth and Carson’s Rule FM Spectral Analysis for tone modulation B ≈ 2 ∆ f+2B m S(f) for m(t)=cos(2 π f m t) NBFM B ≈ 2B m A c-.5A c β .5A c β f c f c +f m f c +2f m f c +3f m f c + 4f m f c-4f m f c-3f m f c-2f m f c-f m f … … .5A c J n ( β ) B ≈ 2 ∆ f WBFM .5A c J n ( β ) Generating FM Signals...
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