FANG S H , LI X , BU B L . 5G digital wireless indoor coverage solution based on open platform small cell[J]. Telecommunications Science, 2019,35(7): 69-77.
ZHANG G H , LI Y , WEI Y ,et al. Fusion and development of DAS system in the construction of 5G room branc[J]. Telecom Engineering Technics and Standardization, 2019(10): 10-14.
GONG G Y , DING Y . Application of traditional DAS indoor distribution system in 5G era[J]. Information Technology & Informatization, 2019(6): 165-167.