ppt

Digital Bandpass Transmission System

  • 2013-09-22
  • 4.59MB
  • Points it Requires : 2

  lOverviewnDigital modulation: the process of converting digital baseband signals into digital bandpass signals (modulated signals). nDigital bandpass transmission system: usually a digital transmission system that includes modulation and demodulation processes. nThere are two methods of digital modulation technology: uUsing analog modulation methods to achieve digital modulation; uThrough on-off keying of the carrier, usually called keying method. uBasic keying methods: amplitude keying, frequency shift keying, phase shift keying

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