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Performance limits of feedforward automatic gain control in mobile radio receivers

Research output: Contribution to journalArticle

  • JP McGeehan
  • DF Burrows
Original languageEnglish
Pages (from-to)385 - 392
Number of pages7
JournalIEE Proceedings F (Communications, Radar and Signal Processing)
Journal issue6
StatePublished - Nov 1981


In the paper, two forms of feedforward automatic gain control circuit, i.e. lowpass and bandpass, are described and their performance limits discussed in respect of nonideal circuit parameters, receiver pre-filtering decorrelation and propagation-medium time delay spread. The bandpass filter limited dynamics configuration is shown to have twice the fade suppression bandwidth of the lowpass filter limited dynamics form and is particularly suited for use in VHF and UHF full carrier AM and 5SB mobile radio receivers. A series of field trials in which a bandpass limited dynamics feedforward automatic gain control circuit was fitted to the audio output of a 457 MHz SSB mobile radio system is described

Additional information

Publisher: Institution of Electrical Engineers (IEE) Rose publication type: Journal article Sponsorship: The authors wish to thank their colleagues in the Wolfson Laboratory for their assistance in conducting the field trials. They are particularly grateful to the UK Science & Engineering Research Council for initially supporting the work and D.F. Burrows is grateful for the award of a research studentship

Research areas

  • radio communication, mobile radio systems

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