Submitted on: 12 April 2015.
Revised on: 04 July 2015.
Accepted on: 23 August 2015.
___________________Electronics and Communications in Japan
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Submitted on: 29 September 2017.
Revised on: 24 December 2017.
Accepted on: 03 February 2018.
___________________Electronics and Communications in Japan
Submitted on: 23 September 2018.
Revised on: 27 December 2018.
Accepted on: 22 February 2019.
___________________Electronics and Communications in Japan
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Submitted on: 06 December 2002.
Revised on: 02 January 2003.
Accepted on: 19 February 2003.
___________________Electronics and Communications in Japan
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