Pilot allocation based on users’ location and user classification in massive MIMO system
Haiyan CAO, Zichang MA, Xiaohui YANG, Wenjuan HU, Fangmin XU, Xin FANG
Telecommunications Science . 2019, (10): 92 -99 .  DOI: 10.11959/j.issn.1000-0801.2019191