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Last active January 8, 2016 00:57
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Phase Modulation
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phase.md

ANU Filter Report

#Impacts of Noise Distortion and Interference

#Waveform

time domain

frequency domain #Waveform Equation

#Circuit Diagram of Signal Modulation

#Practical Applications Phase modulation is widely used for

  • transmitting radio waves

  • WiFi

  • GSM

  • Satellite television source

  • Determining velocity of moving target by extracting doppler information

#Pertinent De/Modulation Information

Demodulation is performed using a Double Balanced Mixer in a Phase Locked Loop

  • Cannot encode large amplitude signals (that exceed π/2)
  • Can use frequency demodulation to decode a phase modulated signal but the signal is distorted, because the relationship is not linear

#Bandwidth BW=2(kpAm +1)fm #Bitrate

#PM vs FM

  • PM immune to DC offset
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