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

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

doi:10.1109/T-VT.1978.23751

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

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

IRIDeS - Resilient EICT Research Promotion Office

Nippon Telegraph & Telephone

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23 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 language	English
Pages (from-to)	211-219
Number of pages	9
Journal	IEEE Transactions on Vehicular Technology
Volume	27
Issue number	4
DOIs	https://doi.org/10.1109/T-VT.1978.23751
Publication status	Published - 1978 Nov

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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.",

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

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