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Radiocommunications systems

  • L. Tetley
  • D. Calcutt

Abstract

Terrestrial communication within the GMDSS involves the transfer of information which exists in one or more different modes—voice, telex (telegraphy), facsimile and data. The raw baseband signals, for these modes, are modulated onto the carrier frequency for propagation, using one of a number of modulation methods—amplitude modulation (AM), frequency modulation (FM) or phase modulation (PM). As with all electronic systems, valued judgements must be made when considering the relative advantages and disadvantages of using one modulation system in preference to another. The design choice of the modulation method to be used in a communications system is based on a number of factors, but for the purpose of this book it is essentially the signal power, the bandwidth and the noise which are to be considered.

Keywords

Carrier Frequency Forward Error Correct Phase Lock Loop Automatic Gain Control Carrier Wave 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© L. Tetley and D. Calcutt 1994

Authors and Affiliations

  • L. Tetley
  • D. Calcutt

There are no affiliations available

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