• Nostalgia

• 2021 KIEES (JEJU - Korea)

• 2019 KIEES (JEJU - Korea)

• 2019 EuMC (Paris - France)

• 2019 IMS (Boston - US)

• 2018 EuMC (Madrid - Spain)

• 2017 IMS (Hawaii - US)

• 2017 ICMIM (Nagoya - Japan)

• 2016 EuMC (London - UK)

• 2016 IMS (San Francisco - US)

• 2015 EuMC (Paris - France)

• 2015 Radio & Wireless Week (San Diego - US)

• 2014 EuMC (Rome - Italy)

• 2014 IMS (Tempa - US)

• 2013 IMS (Seattle - US)

• 2012 IMS (Montreal - Canada)

• 2011 GeMiC (Darmstadt - Germany)

• 2005~2008 University of California, San Diego

• 2007 NRAO (Goldstone)

•1995~2005 KAIST