New block demodulator with an automatic equalizer

Minoru Matsui, Masafumi Hagiwara, Masao Nakagawa

Research output: Contribution to journalArticlepeer-review


The block demodulation method recently has received considerable attention because of its high data transmission efficiency and superior performance. However, the conventional block demodulators do not consider the distortions of amplitude and phase in a transmission channel. As a result, the conventional block demodulators cannot compensate such distortions. In this paper, a new block demodulator with an automatic equalizer is proposed. A two‐dimensional block equalizer is used in the proposed demodulator. The overall performance is improved greatly by the repeated estimation method of combined automatic equalization and carrier estimation. In addition, the number of taps in the equalizer is changed for further improvement. The computer simulation result indicates that the mean‐square error by the proposed demodulator is about 1/100 compared with that of the conventional one when SNR = 30 db.

Original languageEnglish
Pages (from-to)28-36
Number of pages9
JournalElectronics and Communications in Japan (Part I: Communications)
Issue number2
Publication statusPublished - 1991 Feb

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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