All-Digital Massive MIMO-over-Fiber - A New Energy Efficient Radio Architecture for Distributed Wireless Systems
Active antenna arrays are widely explored for increased capacity and energy efficiency in wireless communication systems (massive MIMO). It all relies on coherent transmission from many co-located radios. Completely new possibilities emerge if, instead, a distributed active antenna system is considered. The fundamental challenge is how to maintain accurate coherence?This project is devoted to a new radio architecture directly targeting the needs in distributed wireless systems: All-Digital Massive MIMO-over-Fiber (MIMoF). It is created from the novel integration of all-digital radio technology with emerging high-speed fiber-optical interconnects. Thanks to the all-digital radio approach, all basic analog parts of a traditional radio transceiver are replaced with corresponding digital operations. We take advantage of the rapid development of high-speed optical data links for coherent distribution of RF signals to many remote radio units. The result is a distributed radio architecture with unprecedented software controlled flexibility, energy efficiency, and low cost. This makes attractive also in a broader perspective and a wide-spread use in applications ranging from automotive radars, to smart antenna arrays, medical treatment, and low power Internet-of-Things (IoT) is therefore envisioned. With the best components, the right background, and world-class labs we are in a perfect position to explore the potential and limits of this exciting multi-disciplinary technology.
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- Swedish Research Council (VR) (Public, Sweden)