Senior Member, IEEE
Editorial board member of IEEE Transactions on Wireless Communications
Reviewer for IEEE Transactions on Communications, IEEE Transactions on Wireless Communications, IEEE Transactions on Signal Processing, IEEE Transactions on Information Theory, IEEE Transactions on Vehicular Technology, IEEE Journal on Selected Areas in Communications, IEEE Communications Letters, and IEEE Signal Processing Letters.
Technical program co-chair for Wireless Access track in IEEE VTC 2009 Fall conference, Anchorage, Alaska
Technical program co-chair for Communications track in NCC 2010, Chennai
Co-chair, WISARD 2012 (Workshop in IEEE COMSNETS 2012)
Technical program committee member for IEEE ICC 2010-2012, IEEE GLOBECOM 2008, IEEE WCNC 2005-2006, IEEE VTC 2005 Fall, IEEE VTC Fall 2011, WPMC 2007-2009, WPMC 2011, IEEE TENCON 2008, IEEE COMSNETS 2009-2012, SPCOM 2010, NCC 2010-2011.
Guest Co-Editor, IETE Technical Review, Special Issue on Broadband Wireless Technologies, Sep-Oct 2004.

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