The vision of future mobile communication systems is to provide seamless high data rate wireless connections for anyone at anytime and anywhere, including the high mobility scenarios such as high speed trains and highway vehicles. High mobility results in rapidly time-varying channels, which pose significant challenges in the design of practical systems, including channel modeling, fast handover, location update, synchronization, estimation and equalization, anti-Doppler spread techniques, coding and network capacity, capacity-approaching techniques, dedicated network architectures, distributed antenna techniques and etc. To deal with these challenges, the 6th international workshop on High Mobility Wireless Communications (HMWC) aims at fostering fruitful interactions among interested communication engineers, information theorists and system designers from all over the world, building successful collaborations and bridging the gap between theory and practice.