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

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

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


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
Issue number4
Publication statusPublished - 1978 Nov


Dive into the research topics of 'A Periodic Switching Diversity Technique for a Digital FM Land Mobile Radio'. Together they form a unique fingerprint.

Cite this