A baseband signal processing module, baseband equipment, and signal processing methods are provided in which the baseband signal processing module includes a first interface which is configured to be connected to a radio frequency signal processing module, and a second interface and a third interface which are configured to be connected to different baseband signal processing modules. The baseband signal processing module further includes a control module which transmits and receives signals to and from at least one of the radio frequency signal processing module via the first interface and one of the different baseband signal processing modules via the second interface, and which relays, via the third interface, signals which are to be processed by another of the different baseband signal processing modules.