Submitted on: 30 October 2000.
Revised on: 04 February 2001.
Accepted on: 28 March 2001.
___________________IET Wireless Sensor Systems---WILEY
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Submitted on: 24 September 1999.
Revised on: 27 December 1999.
Accepted on: 08 January 2000.
___________________IET Wireless Sensor Systems---WILEY
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http://reply.papertrans.cn/2/122/12200/12200-15.png
Submitted on: 05 August 1998.
Revised on: 02 September 1998.
Accepted on: 13 September 1998.
___________________IET Wireless Sensor Systems---WILEY
Submitted on: 26 November 2000.
Revised on: 04 March 2001.
Accepted on: 25 March 2001.
___________________IET Wireless Sensor Systems---WILEY
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Submitted on: 16 December 2002.
Revised on: 27 March 2003.
Accepted on: 20 May 2003.
___________________IET Wireless Sensor Systems---WILEY