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What is TDD Reciprocity Calibration in MIMO Testbed about?

This document summarizes an LTE compatible massive MIMO testbed based on OpenAirInterface that incorporates all LTE protocol layers and enables experimentation with commercial devices. The testbed utilizes up to 64 antennas and exploits TDD reciprocity by calibrating the uplink channel to obtain downlink channel state information for precoding data and reference signals. Key aspects of the system include parallelizing IFFT and precoding calculations, calculating beamforming weights based on channel reciproc

Author

gameOver

Language

EN