Control unit, system and method for transmitting and receiving radio signals in multiple frequency ranges

摘要

A DAS system (10) for transmitting and receiving radio signals in multiple frequency ranges is described. The system comprises a control unit (30) with at least one first port (30-1) for forwarding first radio signals (20-1) in a first frequency range and a second port (30-2) for transmitting second radio signals (20-2 ) in a second frequency range. A plurality of remote units (50) are connected to the control unit (30) via a distribution network (40). The remote units 50 have first antenna elements (50-1) for transmitting and receiving the radio signals (20-1) in the first frequency range and second antenna elements (50-2) for transmitting and receiving the radio signals (20-2) in the second frequency range. The control unit (30) comprises a modulator (34) for converting the second radio signals (20-2) to a further frequency range and the remote units (50) have a demodulator (54) for converting the second radio signals (20-2) from another frequency range in another frequency range.