MODULATION

GSM Glossary

GSM — Modulation

 

 

 

 

 

 

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Information on Modulation

The shifting or translation of a signal from one frequency band to another is accomplished by the process of modulation. In this process, the baseband signal is impressed in some way on a carrier signal at a higher frequency such that one or more of the characteristics of the carrier signal are altered. In this manner, baseband frequencies are translated in frequency up to the carrier frequency. The three characteristics of the carrier signal that can be altered are the amplitude, the frequency and the phase.
     There are three basic types of digital modulation:

  • frequency shift keying (FSK)
  • phase shift keying (PSK)
  • amplitude shift keying (ASK)


    • Other topics in our resources on GSM related to Modulation include: 
     
  • frequency shift keying (FSK)
    		•
  • gaussian minimum shift keying (GMSK)

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