Submitted on: 07 August 2014.
Revised on: 02 October 2014.
Accepted on: 19 November 2014.
___________________IEEE Circuits and Systems Magazine
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Submitted on: 13 August 2020.
Revised on: 05 October 2020.
Accepted on: 18 October 2020.
___________________IEEE Circuits and Systems Magazine
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Submitted on: 05 September 2005.
Revised on: 25 October 2005.
Accepted on: 25 November 2005.
___________________IEEE Circuits and Systems Magazine
Submitted on: 16 January 2009.
Revised on: 06 April 2009.
Accepted on: 21 April 2009.
___________________IEEE Circuits and Systems Magazine