Unrestricted data throughput channel aggregation, required for Massive MIMO baseband processing. Avoid standard backplane bandwidth restriction and undeterministic communication protocol. Scalable baseband processing through a modular approach and user-defined mesh topology. Benefits from the most advanced industry telecom standards (MTCA + ATCA + FMC). Through the use of standard FMC modules, the testbed is fully upgradable to upcoming generations, including higher bandwidth through support of different sampling rates. IQ sampler modules (ADCs/DACs) can be replaced with currently available complete RF interface modules (radio head) for sub-6GHz applications (see TitanMIMO-6 Series).