AmpliTech Group, Inc. and researchers at Northeastern University's Institute for Intelligent Networked Systems have successfully demonstrated the first open-source prototype of a massive MIMO O-RAN system achieving O-RAN Category B operation in a laboratory environment. The demonstration integrates AmpliTech's commercial-grade mMIMO Category B radio unit with the OpenAirInterface (OAI) CU/DU stack, marking the first time a full, end-to-end massive MIMO O-RAN system has been assembled entirely from open, interoperable components.
The demonstration combined AmpliTech's mMIMO O-RAN Category B radio unit with OAI's CU/DU into a single cohesive, standards-compliant platform. The INSI team showcased hybrid beamforming capabilities with a 2-layer MIMO configuration, demonstrating sustained throughput under mobility conditions with proper beam management. Critically, it validates that AmpliTech's radio unit, designed for commercial deployment, can operate at full performance within a fully open, multi-vendor stack.
Massive MIMO systems, which use large antenna arrays to serve multiple users simultaneously through spatial multiplexing, have historically required tightly integrated, vendor-specific implementations. This demonstration challenges that assumption by showing that the full stack, from the physical layer up through the RAN control plane, can be assembled from open, interoperable components, with no reliance on proprietary, closed solutions. Category B is the technically demanding fronthaul interface that enables this at massive MIMO scale, and its successful validation here marks a first for open-source RAN.
Tommaso Melodia, Director of the Institute for Intelligent Networked Systems at Northeastern University, stated that this demonstration represents a significant step toward making Massive MIMO Open RAN a practical reality rather than a research ambition. He emphasized that showing AmpliTech's commercial massive MIMO radio integrates seamlessly into a fully open-source stack opens new possibilities for how next-generation networks are designed, deployed, and optimized without locking operators into proprietary ecosystems.
Irfan Ghauri, Director of Operations at the OpenAirInterface Software Alliance, noted that O-RAN 7.2 Category B is the interface that truly unlocks massive MIMO at scale, and achieving it with an open-source stack has been a long-standing goal for the community. He described the demonstration as exactly the kind of end-to-end validation that turns open-source software from a research tool into a credible foundation for commercial deployment, showing that openness and high-performance massive MIMO are fully compatible.
Fawad Maqbool, CEO and CTO of AmpliTech Group, called the demonstration a critical milestone for both AmpliTech and the Open RAN ecosystem. He stated that seeing their 64T64R Category B radio operate end-to-end within a fully open-source stack proves that high-capacity massive MIMO and true multi-vendor openness are no longer in tension. This validation gives operators confidence to deploy Open RAN at scale and demonstrates AmpliTech's commitment to building radios that work in real, disaggregated environments.
The INSI team led the system integration, testbed configuration, and validation measurements, providing a reproducible reference implementation that academic and industry researchers can build upon. The open-source nature of the demonstration means the architecture can be studied, replicated, and extended, accelerating adoption across the research and operator communities. The results align with growing momentum around Open RAN and next-generation wireless systems, where flexibility, vendor interoperability, and intelligent control are viewed as essential properties for future 5G and 6G deployments.
For business and technology leaders, this breakthrough has significant implications for telecommunications infrastructure strategy. The demonstration challenges the traditional telecommunications equipment model dominated by proprietary, vertically integrated solutions from major vendors. By proving that commercial-grade massive MIMO radios can operate effectively within fully open, multi-vendor stacks, this development could accelerate the adoption of Open RAN architectures, potentially reducing costs, increasing vendor competition, and enabling more flexible network deployments. The validation of Category B fronthaul operation at massive MIMO scale addresses one of the key technical hurdles that has limited open RAN adoption for high-performance applications, potentially enabling operators to deploy open, disaggregated networks without sacrificing the performance benefits of advanced MIMO technologies.
