Masafumi Hagiwara, Masao Nakagawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)


The authors study automatic estimation of an input signal's characteristics, type such as modulation type, carrier frequency, and symbol rate from a received digital signal. Automatic estimation of an input signal is used to realize an intelligent demodulator which can demodulate any type of input signal automatically. They discuss the discrimination between PSK (phase-shift-keyed) and MSK (minimum-shift-keyed) signals. Using the proposed method, it is shown by computer simulation that they can be precisely discriminated when the signal-to-noise ratio (SNR) greater than equivalent to 5 dB. They then estimate the carrier frequency. Using computer simulations, estimation errors are within 10% when SNR greater than equivalent to 5 dB.

Original languageEnglish
Title of host publicationUnknown Host Publication Title
PublisherOhmsha Ltd
Number of pages5
ISBN (Print)4274031888
Publication statusPublished - 1987 Dec 1

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Hagiwara, M., & Nakagawa, M. (1987). AUTOMATIC ESTIMATION OF AN INPUT SIGNAL TYPE. In Unknown Host Publication Title (pp. 254-258). Ohmsha Ltd.