Method for calibrating smart antenna array in real time

Details Method for calibrating smart antenna array in real time Method for calibrating smart antenna array in real time

2006-08-29

2006-08-29

Phan, Dao (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

C342S174000

Reexamination Certificate

active

07098847

ABSTRACT:
A real-time calibration method for a smart antenna array. The method includes: before installation, a smart antenna array is pre-calibrated to obtain transmission-coefficient matrix between antenna units; after installation at site, the pre-calibrated transmission-coefficient matrix is loaded in a base station to which the smart antenna array connects; during running, every transmission link of the base station transmits a unit calibration signal in sequence in a time-slot, and all other links, except the transmitting link, are in a reception state to receive the unit calibration signal, and the received unit calibration signals are recorded; with the received unit calibration signals and pre-calibrated transmission-coefficient matrix, the smart antenna array is calibrated. The method does not need beacon antenna, coupled structure of the antenna array and a special calibration link.

REFERENCES:
patent: 6124824 (2000-09-01), Xu et al.
patent: 6236839 (2001-05-01), Gu et al.
patent: 6600445 (2003-07-01), Li
patent: 6940453 (2005-09-01), Kim
patent: 2004/0214604 (2004-10-01), Yoon et al.
patent: 2005/0047384 (2005-03-01), Wax et al.
patent: 2005/0227628 (2005-10-01), Inanoglu

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