Calibration of downlink and uplink channel responses in a wireless mimo communication system
作者： John W. Ketchum , Steven J. Howard , Mark S. Wallace , Jay Rodney Walton
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摘要: The downlink and uplink are calibrated to account for differences in the responses of transmit receive chains at an access point a user terminal. For initial calibration, terminal MIMO pilots on uplink, which used derive channel estimates including applicable transmit/receive chains. Correction matrices (a) (b) derived based these thereafter by terminal, respectively. follow-on one entity transmits pilot steered reference. other derives first matrix reference second calibration error (c) (d), contain errors (b), (d) may be iteratively adjusted adaptive procedure minimize between two matrices.
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