Distributed antenna system with hybrid signal sources

An in-building distributed repeater system comprising:

• an active antenna unit configured to frequency-division-multiplex, amplify, and transmit analog intermediate frequency (IF) signals obtained by frequency-shifting wireless mobile communication signals of a plurality of service bands received from a plurality of mobile communication base stations, frequency-shift received frequency-division-multiplexed analog IF signals by service band, and transmit service-band-wise wireless mobile communication signals to the plurality of mobile communication base stations;
• a remote service unit configured to transmit analog IF signals obtained by frequency-shifting wireless mobile communication signals of a plurality of service bands received from a mobile communication terminal, frequency-shift received analog IF signals by service band, and transmit service-band-wise wireless mobile communication signals;
• and
• a headend unit comprising:
• a downstream digital repeater circuitry connected to the active antenna unit, connected to the remote service unit through an Ethernet cable, and configured to perform digital signal processing on frequency-division-multiplexed analog IF signals input from the active antenna unit separately for each service band and distribute the signals to remote service units;
• an adder circuitry configured to add up analog IF signals received from multiple remote service units;
• and
• an upstream digital repeater circuitry configured to output one Tx upstream analog IF signal generated by performing digital signal processing for each service band on an output of the adder circuitry.