ch3.5apm - 1 EEN 404 EEN 404 ommunication Systems...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 EEN 404 EEN 404 ommunication Systems ommunication Systems Communication Systems Communication Systems Ch3.5: Analog Pulse Modulation Ch3.5: Analog Pulse Modulation 2 Ch2.8 Sampling Theory Ch2.8 Sampling Theory  Sampling theorem: If a signal x(t) satisfies then the signal is completely described by instantaneous sample values with sampling frequency 2W: Nyquist frequency Sampled signal: • Reconstruction: from samples to recover the signal x(t) he signal t) n be exactly reconstructed from the sampled The signal x(t) can be exactly reconstructed from the sampled signal by passing it through an ideal lowpass filter with bandwidth B where W<B<f s-W and f s =1/T s 3  Sampled signal:  Spectrum of sampled signal Eq. (2.136): FT: lowpass filtering for construction reconstruction B • f s > 2W  no overlap between spectra <B<fs cover t) ithout distortion • W<B<fs-W  recover x(t) without distortion 4 • liasing if < 2W  Possible distortion Aliasing if f s 2W • Non-ideal lowpass filter 5...
View Full Document

This note was uploaded on 10/28/2010 for the course EEN 404 taught by Professor X.cai during the Spring '10 term at University of Miami.

Page1 / 11

ch3.5apm - 1 EEN 404 EEN 404 ommunication Systems...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online