Exploiting Channel Reciprocity in Massive MIMO
نویسنده
چکیده
• Massive MIMO prototype 64 Antenna array supported by 16 ExpressMIMO2 cards Centralized high end computing engine • Massive MIMO key challenges Acquisition of channel information at transmitter (CSIT); Pilot contamination; Fast and distributed coherent signal processing; Hardware impairment, etc. • Time Division Duplexing (TDD) Use TDD channel reciprocity for massive MIMO to ease the acquisition of CSIT : no feedback needed; However, hardware non-symmetry destroys the TDD reciprocity. • Relative Calibration Compensate the impairment by a multiplicative matrix; Cost efficient: no additional hardware needed. Exploiting Channel Reciprocity in Massive MIMO Xiwen JIANG, Florian Kaltenberger, Raymond Knopp, Luc Deneire * Email: [email protected]
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