RADIO DEVICE AND METHOD OF CALIBRATION THEREOF

Title:

RADIO DEVICE AND METHOD OF CALIBRATION THEREOF

Document Type and Number:

WIPO Patent Application WO/2000/008777

Kind Code:

A1

Abstract:

An adaptive-array radio base station comprises three or more antenna elements (ANT¿j? : j=1, 2, ...,n) and a signal processing circuit (20). For calibration, the difference in phase rotation and the difference in amplitude fluctuation between the transmitting and receiving circuits in each transmission system are estimated on the basis of the known signal sent by each transmission system and the received signals measured in the transmission system. The quantity of phase rotation by the phase shifter (PS¿j?) and the quantity of amplitude fluctuation of the attenuator (ATT¿j?) are set according to the results of estimation. Therefore, the transmission characteristics of the transmitting and receiving circuit can be calibrated using a simplified inexpensive configuration without providing a special measuring circuit.

Inventors:

DOI YOSHIHARU (JP)
IINUMA TOSHINORI (JP)

Application Number:

PCT/JP1999/004173

Publication Date:

February 17, 2000

Filing Date:

August 02, 1999

Export Citation:

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Assignee:

SANYO ELECTRIC CO (JP)
DOI YOSHIHARU (JP)
IINUMA TOSHINORI (JP)

International Classes:

H01Q3/26; H04B7/04; H04B17/19; H04B17/29; H04W16/28; H04W24/02; H04W24/06; H04W88/08; (IPC1-7): H04B7/08; H01Q3/26

Foreign References:

JPH10503892A	1998-04-07
JPH02265302A	1990-10-30
JPH1146180A	1999-02-16

Other References: