http://reply.papertrans.cn/2/118/11757/11757-21.png
http://reply.papertrans.cn/2/118/11757/11757-22.png
http://reply.papertrans.cn/2/118/11757/11757-23.png
http://reply.papertrans.cn/2/118/11757/11757-24.png
http://reply.papertrans.cn/2/118/11757/11757-25.png
Submitted on: 25 November 2002.
Revised on: 19 December 2002.
Accepted on: 02 January 2003.
___________________IEEE COMMUNICATIONS MAGAZINE---IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Submitted on: 15 July 2012.
Revised on: 07 September 2012.
Accepted on: 21 October 2012.
___________________IEEE COMMUNICATIONS MAGAZINE---IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Submitted on: 20 November 2010.
Revised on: 15 March 2011.
Accepted on: 15 April 2011.
___________________IEEE COMMUNICATIONS MAGAZINE---IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Submitted on: 12 February 2006.
Revised on: 12 March 2006.
Accepted on: 28 April 2006.
___________________IEEE COMMUNICATIONS MAGAZINE---IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
http://reply.papertrans.cn/2/118/11757/11757-30.png