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Journal of Inforamtion Science and Engineering, Vol.18 No.1, pp.115-124 (January 2002)

Single Switch Chinese Phonetic Communication System

Cheng-Hong Yang, Cheng-Huei Yang*, Li-Yeh Chuang+
and Ching-Hsing Luo**
Department of Electronic Engineering
National Kaohsiung University of Applied Science
Kaohsiung, 807 Taiwan
*Department of Telecommunication and Computer Engineering
National Kaohsiung Institute of Marine Technology
Kaohsiung, 840 Taiwan
+Department of Chemical Engineering
I-Shou University
Kaohsiung, 840 Taiwan
**Department of Electrical Engineering
National Cheng Kung University
Tainan, 701 Taiwan

Morse code, with its single switch operation, has been shown to be an excellent adaptive communication device for the disabled, especially those with impaired hand coordination and dexterity. Because a stable typing rate is required for an accurate recognition of Morse code, it presents a major hindrance to disabled persons in applying Morse code as a useful communication tool. Therefore, a suitable adaptive recognition method is needed. This paper applies the Least-Mean- Square algorithm to an adaptive Chinese phonetic Morse code recognition system which includes four processes: space recognition, tone recognition, adaptive processing, and character recognition. Statistical analyses demonstrated that the proposed method results in a better recognition rate compared to alternative methods in the literature.

Keywords: Morse code, adaptive signal processing, least-mean-square algorithm, Friedman test, multiple comparison test

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Received June 15, 1999; revised March 17, 2000; accepted May 3, 2000.
Communicated by Mark H. Y. Liao.