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Title:
信号処理システムにおけるディジタルダウンコンバータの校正のための方法と装置
Document Type and Number:
Japanese Patent JP4287529
Kind Code:
B2
Abstract:
A calibration technique for digital down converters in a signal processing system, wherein a digital down converter is selected by a system controller for calibration. The digital down converter's settings are copied into a calibration digital down converter which mimics the operation of the selected digital down converter. A best polarization diversity detector signal path, an optimal phase offset value for an in-phase data signal, an optimal phase offset value for a quadrature phase data signal, and a normalized gain value for the in-phase and quadrature phase signals of the selected digital down converter are determined. The system controller updates the selected digital down converter with the determined optimal settings. This procedure is repeated for each digital down converter in the signal processing system, while the signal processing occurs simultaneously.

Inventors:
James Dee Green
Lawrence Jay Hirschman
Eugene El. Ferraro
Application Number:
JP3347999A
Publication Date:
July 01, 2009
Filing Date:
February 10, 1999
Export Citation:
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Assignee:
Riton Systems, Inc.
International Classes:
G01D18/00; G01S7/526; G01J1/04; G01J1/42; G01J4/00; G01J5/08; G01L27/00; G01V1/16; G01V1/28; G01V1/36; G01V8/24; G02F1/125; G08C23/04; H03D3/00; H03D7/00; H04B7/10; H04B10/12; H04B10/148; H04B13/00; H04J1/05; G08C; H04B
Domestic Patent References:
JP2000028429A
JP11328568A
JP7019949A
JP8262513A
JP2000502230A
JP7143073A
JP7140044A
Foreign References:
US5493581
Attorney, Agent or Firm:
Shiro Nakajima