Level crossing rate and average fade duration for time diversity reception in Rayleigh fading conditions

F. Adachi, M. T. Feeney, J. D. Parson

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Time diversity, in which the same data are transmitted several times, is attractive in digital land mobile radio and is simple to implement because only one antenna is required. Expressions for the level crossing rate (LCR) and average fade duration (AFD) are derived in this paper for a system in which each data symbol is transmitted twice (two-branch diversity). As far as LCR is concerned, the expected diversity advantages can be obtained for a data repetition period, normalised by the maximum Doppler frequency, of about 0.2. For a large data repetition period, the AFD is halved. Measured values of LCR and AFD, obtained from 900 MHz signals received at a base station site, are in good agreement with predicted values.

Original languageEnglish
Pages (from-to)501-506
Number of pages6
JournalIEE Proceedings F: Communications Radar and Signal Processing
Volume135
Issue number6
DOIs
Publication statusPublished - 1988 Jan
Externally publishedYes

Keywords

  • Radiocommunication
  • Receivers

ASJC Scopus subject areas

  • Signal Processing
  • Engineering(all)

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