A Periodic Switching Diversity Technique for a Digital FM Land Mobile Radio

F. Adachi, T. Hattorl, K. Hirade, T. Kamata

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

A simple and efficient diversity technique is proposed for use in a digital FM land mobile radio communication system. This technique receives two RF signals periodically by switching two antenna branches at a rate moderately higher than the bit rate. The improved bit error rate (BER) performance resulting from the use of diversity is shown to be the effect of transforming the probability density function of the signal energy per bit to noise power density ratio to a sharper distribution. Laboratory simulation test results show that in a Manchester-coded frequency-shift keying (FSK) system with a bit rate of 600 bit/s and a frequency deviation of ±5 kHz, the diversity gain at an average BER of 1 × 10−3 is about 10 dB for an optimum switching rate of about 2 kHz. This diversity improvement is also verified by the field test performed in a suburban area.

Original languageEnglish
Pages (from-to)211-219
Number of pages9
JournalIEEE Transactions on Vehicular Technology
Volume27
Issue number4
DOIs
Publication statusPublished - 1978 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics

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