The performance of linear modulation through a frequency hopped channel

DJ Purle, MA Beach

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

This paper considers the implementation of a frequency hopping modem utilising a highly bandwidth efficient linear modulation scheme. The bandwidth of the narrowband message is minimised, and differential operation provides resilience to fading and the nonlinearity of the FH channel. The performance of a single user system has been derived through simulation, with a novel approach for modelling of the FH channel. Instead of simulating a frequency hopper, transmitting through a wideband channel and de-hopping the FH signal at the receiver, the system uses a narrowband `hopping' channel model, which alters its characteristics to reflect those of the FH propagation environment. To validate this model, measurements have been undertaken into the nature of propagation through the channel. The results are presented in terms of the fading undergone by a hopped signal, and the statistics of that signal at the receiver
Translated title of the contributionThe performance of linear modulation through a frequency hopped channel
Original languageEnglish
Title of host publicationIEE Coll. on Spread Spectrum Techniques for Radio Communication Systems
PublisherInstitution of Engineering and Technology (IET)
Pages9/1 - 9/6
Publication statusPublished - Jun 1992
EventColloquium on Spread Spectrum Techniques for Radio Communication Systems - London, United Kingdom
Duration: 1 Jun 1992 → …

Conference

ConferenceColloquium on Spread Spectrum Techniques for Radio Communication Systems
CountryUnited Kingdom
CityLondon
Period1/06/92 → …

Bibliographical note

Rose publication type: Conference contribution

Sponsorship: The authors would like to thank UK SERC and GPT, Beeston for their financial support of
D.J. Purle, the Centre for Communications Research for providing simulation facilities, and their colleagues for many useful discussions related to this work

Keywords

  • amplitude modulation
  • bandwidth compression
  • fading
  • frequency agility

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