lecture14 - Lecture14Outline Announcements...

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Lecture 14 Outline Announcements Graded exams ready; Midterm postmortem Regular HW this week, due tomorrow Vestigial Sideband Modulation Quadrature Modulation Coherent Detection: The Phase Lock Loop Implementation issues in AM Introduction to Frequency/Phase Modulation
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Midterm Histogram Very large spread and low median/mean 20 MT bonus points for correcting your mistakes Corrections will be graded; bonus pts for corrections  only MTs with 94+/100 need not be redone (receive points) Mean 70.86 Median 67.75 High: 99 Low: 42
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Review of Last Lecture Noise in AM Systems SNR (DSBSC)=P /P = P m /(2N 0 B)= P s /(N 0 B) Similar calculation for standard AM, SSB Single-Sideband Modulation Only transmit upper or lower sidebands Generate using Hilbert Transform USB LSB DSBSC/AM Demod m´(t)+ n´(t) cos( ϖ c t+ φ29 s(t)=m(t)cos( ϖ c t+ φ29 + n(t) 1 AWGN, PSD N 0 /2 -B B LPF
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lecture14 - Lecture14Outline Announcements...

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