Performance Evaluation of Millimeter-Wave-Based Communication System in Tunnels. - Sung-Woo Choi; Hee-Sang Chung; Dae-Soon Cho; Seung Nam Choi; Hyoun-Jeong Oh; Ilgyu Kim; Dong-Ha Kim; Jae-Min Ahn 001 (GLOBECOM Workshops, 2015)