Adaptive Morse code recognition using variable degree variable step size LMS for persons with disabilities

Article type: Research Article

Authors: Yang, Cheng‐Hong

Affiliations: Department of Electronic Engineering, National Kaohsiung Institute of Technology, 415, Chien‐Kung Road, Kaohsiung, Taiwan 807 Tel.: 886‐7‐3926752; Fax: 886‐7‐3836844; E‐mail: chyang@ sunsvr.nkit.edu.tw

Abstract: In this paper, we applied variable degree, variable step size LMS algorithm to adaptive Morse code recognition for persons with impaired hand coordination and dexterity. The automatic recognition of Morse code by the disabled is difficult because they cannot maintain a stable typing rate. Therefore, a suitable adaptive automatic recognition method is needed. In this adaptive Morse code recognition method, three processes are involved: character separation, character recognition, and adaptive processing. Statistical analyses demonstrated that the proposed method resulted in a better recognition rate compared to alternative methods from the literature.

Keywords: Morse code, adaptive signal processing, LMS, Friedman test, multiple comparison test

Journal: Bio-Medical Materials and Engineering, vol. 8, no. 5-6, pp. 343-352, 1998