Artificial noise-aided secure beamforming for multigroup multicast. - Wanjik Kim; Sukjong Ha; Jeongwan Koh; Joonhyuk Kang (CCNC, 2018)

Secure Transmission via Lens Antenna Array in Millimeter Wave MISO Systems. - Hyojin Lee; Wanjik Kim; Joonhyuk Kang (MILCOM, 2019)