A digital distributed antenna system, DAS, comprising: a plurality of remote radio units,RRUs, (152, 156, 160, 162) in communication with mobile devices; a plurality of base transceiver stations,BTS's, (104, 106, 108, 110, 112, 114, 118) covering multiple technologies; and a central hub coupled to the RRUs and the BTS's, wherein the BTSs are connected via the central hub to a plurality of RRUs, one or more multiple technology RRUs being a digital Remote Radio Unit from which a multiplexed stream is sent to a coverage area, to reach the mobile devices; characterized by a digital filter bank comprising one or more digital filters, each digital filter being matched to a unique cell resource of a BTS cell, a cell resource including a band of contiguous frequencies within a frequency spectrum and being used by at least one or more downlink RF signals being received from one or more of the BTS's, and each digital filter being matched to a unique cell resource, a cell resource including a band of frequencies within a frequency spectrum and including at least one or more signals being received from one or more mobile devices; wherein, in a downlink direction, the DAS is adapted to multiplex a plurality of downlink RF signals, to digitize a plurality of downlink signals, and to filter the digitized plurality of downlink signals on a cell resource basis with a digital filter bank, wherein each filter in the digital filter bank is allocated a distinct individual transfer function to match the cell resource it is filtering, wherein the central hub is adapted to allocate routing of the resulting digitized filtered cell resources in the downlink direction to one or more appropriate RRUs according to pre-programmed routines in the central hub to provide individual routing allocation of each cell resource to RRUs for transmission to their mobile devices, wherein, in an uplink direction, the DAS is adapted to multiplex a plurality of uplink RF signals, to digitize a plurality of uplink signals, and to filter the digitized plurality of uplink signals on a cell resource basis with a digital filter bank, wherein each filter in the digital filter bank is allocated a distinct individual transfer function to match the cell resource it is filtering, and wherein the central hub is adapted to allocate routing of the resulting digitized filtered cell resources in the uplink direction to one or more appropriate BTS's according to pre-programmed routines in the central hub to provide individual routing allocation of each cell resource to BTS's. a plurality of remote radio units,RRUs, (152, 156, 160, 162) in communication with mobile devices; a plurality of base transceiver stations,BTS's, (104, 106, 108, 110, 112, 114, 118) covering multiple technologies; and a central hub coupled to the RRUs and the BTS's, wherein the BTSs are connected via the central hub to a plurality of RRUs, one or more multiple technology RRUs being a digital Remote Radio Unit from which a multiplexed stream is sent to a coverage area, to reach the mobile devices; characterized by a digital filter bank comprising one or more digital filters, each digital filter being matched to a unique cell resource of a BTS cell, a cell resource including a band of contiguous frequencies within a frequency spectrum and being used by at least one or more downlink RF signals being received from one or more of the BTS's, and each digital filter being matched to a unique cell resource, a cell resource including a band of frequencies within a frequency spectrum and including at least one or more signals being received from one or more mobile devices; wherein, in a downlink direction, the DAS is adapted to multiplex a plurality of downlink RF signals, to digitize a plurality of downlink signals, and to filter the digitized plurality of downlink signals on a cell resource basis with a digital filter bank, wherein each filter in the digital filter bank is allocated a distinct individual transfer function to match the cell resource it is filtering, wherein the central hub is adapted to allocate routing of the resulting digitized filtered cell resources in the downlink direction to one or more appropriate RRUs according to pre-programmed routines in the central hub to provide individual routing allocation of each cell resource to RRUs for transmission to their mobile devices, wherein, in an uplink direction, the DAS is adapted to multiplex a plurality of uplink RF signals, to digitize a plurality of uplink signals, and to filter the digitized plurality of uplink signals on a cell resource basis with a digital filter bank, wherein each filter in the digital filter bank is allocated a distinct individual transfer function to match the cell resource it is filtering, and wherein the central hub is adapted to allocate routing of the resulting digitized filtered cell resources in the uplink direction to one or more appropriate BTS's according to pre-programmed routines in the central hub to provide individual routing allocation of each cell resource to BTS's.