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Achieving High Data Rates in Distributed MIMO Systems

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Long after MIMO communication has been proposed as a viable path around the rate limitations of point-to-point communication, achieving its most general forms remains an elusive goal. In today’s Internet, the scenario of interest is realizing wireless data transmission at high data rates over the last hop, serving simultaneously multiple users from different access point locations. Current multiuser signal multiplexing schemes require that different access points coordinate their transmissions to the symbol and phase level, thus requiring the realization of a distributed MIMO system. In this talk we describe the techniques used in creating such a system using over-the-air synchronization and present our experimental results. We emphasize particularly achieving scalability in a large deployment and discuss techniques for reducing synchronization and channel estimation overhead, while achieving high rates of spectral reuse.

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