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Pulse Amplitude Modulation

Pulse Amplitude Modulation. Section 6.6. DSB/SC-AM Modulation (Review). Frequency Shift Property (Review). Frequency Spectrum of DSB/SC-AM Signal (Review). Carrier Signal for Amplitude Modulation. Pulse Amplitude Modulation. Frequency Spectra for Pulse Amplitude Modulation.

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Pulse Amplitude Modulation

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  1. Pulse Amplitude Modulation Section 6.6

  2. DSB/SC-AM Modulation (Review)

  3. Frequency Shift Property (Review)

  4. Frequency Spectrum of DSB/SC-AM Signal (Review)

  5. Carrier Signal for Amplitude Modulation

  6. Pulse Amplitude Modulation

  7. Frequency Spectra for Pulse Amplitude Modulation Replication is caused by multiplication of m(t) by cos() (Determined by fourier series)

  8. Frequency Modulation (Review) Multiple signals are transmitted simultaneously through the same channel.

  9. Time-Division Multiplexing Multiple signals are transmitted in the same channel with the signals separated in time, but not in frequency! The switches at the receiving end is synchronized to the switches of the multiplexer.

  10. Demodulator for PAM

  11. Telephone System in the US (Sampling rate: 8 KHz) (Need to low pass filter the circuit) The maximum frequency content cannot exceed 3.2 KHz. Drawback: deterioration in voice quality. Ears can hear up to 20 KHz.

  12. Pulse Modulation Using Sample and Hold (model the sample and hold with sampling and filtering behavior)

  13. Impulse Response of a Data Hold Circuit

  14. Frequency Spectra for Flat-Top PAM

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