System and method for testing multiuser multi-input multi-output system

The invention discloses a system and a method for testing a multiuser multi-input multi-output system. the system for testing a device to be tested comprises: a signal processor, configured to generate a plurality of independent signals and applied to a first fading channel characteristic to each one of the independent signals to generate a plurality of first fading test signals; a test system interface, configured to provide the plurality of first fading test signals for one or more signal input interfaces of the device to be tested (DUT); a second signal processor, configured to apply a second fading channel characteristic to a plurality of output signals of the DUT to generate a plurality of second fading test signals, wherein the second fading channel characteristic is deduced according to the first fading channel characteristic; and one or more test instrument, configured to measure at least one performance characteristic of the DUT according to the plurality of second fading test signals.