Title:
METHOD AND SYSTEM FOR CALIBRATING ANTENNA ARRAY
Document Type and Number:
Japanese Patent JP3546773
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a method for calibrating a transmitter and/or a receiver while an antenna array is in use by coding a calibration signal so as to be substantially orthogonal to a communication traffic signal with a coding procedure, extracting the injected calibration signal and calibrating part of a circuit of the transmitter and/or the receiver on the basis of the extracted calibration signal.
SOLUTION: A calibration signal generator 107 outputs a calibration signal that is coded so as to be substantially orthogonal to a communication traffic signal in compliance with a prescribed coding procedure to a divider 110 via a line 108, The divider 110 applies the calibration signal to a directional coupler 100 connected to a transmission line 23 through which a signal from a reception antenna array is applied to a down converter 18. Then the calibration signal is extracted and a configuration section of the transmitter and/or the receiver can be calibrated on the basis of the calibration signal. According to this method, since the usual operation of the antenna array is substantially not affected, the transmission/reception of the communication traffic signal can be continued without being interrupted even during the calibration.
Inventors:
Robert Arnott
Application Number:
JP28613399A
Publication Date:
July 28, 2004
Filing Date:
October 06, 1999
Export Citation:
Assignee:
NEC
International Classes:
G01R29/10; H01Q3/26; H01Q21/24; H01Q21/30; H04B7/26; H04B17/00; H04J13/00; (IPC1-7): H01Q3/26; H04B7/26; H04J13/00
Domestic Patent References:
| JP10503892A | ||||
| JP11046180A | ||||
| JP10336149A | ||||
| JP9121195A | ||||
| JP9138270A | ||||
| JP3048540A | ||||
| JP8256008A |
Foreign References:
| WO1998042093A1 | ||||
| WO1999029049A1 | ||||
| US5546090 | ||||
| GB2313523A | ||||
| WO1999046880A1 |
Attorney, Agent or Firm:
Toshiaki Morisaki