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BS system which combines an Antenna Array with an Active Transceiver Unit Array and a Radio Distribution Network   [0002] 
3GPP TR 37.842 V1.11.0   [0016] 
3GPP TS 37.141 V13.2.0   [0035] 
3GPP TS 37.105 V13.0.0   [0065]  [0081]