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1. (WO2018157852) METHOD FOR CALIBRATION OF A MIMO ARRAY BASED ON AN OPPORTUNISTIC SIGNAL

Pub. No.:    WO/2018/157852    International Application No.:    PCT/CN2018/077851
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Sat Mar 03 00:59:59 CET 2018
IPC: H04B 17/12
H04B 7/0413
H04B 17/10
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
Inventors: MOLEV SHTEIMAN, Arkady
QI, Xiao-Feng
Title: METHOD FOR CALIBRATION OF A MIMO ARRAY BASED ON AN OPPORTUNISTIC SIGNAL
Abstract:
A method, system, and computer-readable medium are provided for calibrating elements of a MIMO array. The method includes the steps of receiving samples of a signal from a plurality of antenna units included in the MIMO array, generating an antenna domain channel estimate based on the samples of the signal received from each antenna unit, estimating a set of spatial parameters based on the antenna domain channel estimate, generating a reconstructed channel based on the estimated set of spatial parameters, comparing the antenna domain channel estimate and the reconstructed channel to determine errors associated with a set of mismatch parameters for each antenna unit, and adjusting the set of mismatch parameters based on the errors. Each antenna unit in the plurality of antenna units is configured to sample the signal based on a clock corresponding with the antenna unit.