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Text File  |  1999-10-21  |  326b  |  13 lines
  1. Detecting and demodulating a single-sideband signal by converting it to a pulse-modulated signal 
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  3. Combining amplitude and frequency modulation to produce a single-sideband signal
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  5. Using an audio-frequency signal to produce pulse-length modulation
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  7. Compressing speech at the transmitter and expanding it at the receiver
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