Title:
DIGITAL MODULATION SIGNAL MEASURING DEVICE AND METHOD CAPABLE OF EVALUATING SPECTRUM OF NOISE COMPONENT
Document Type and Number:
WIPO Patent Application WO/2000/069136
Kind Code:
A1
Abstract:
A digital modulation signal measuring device being so constructed as to correct a frequency error of a base band component contained in a digital modulation signal to be measured to generate a signal system having an ideal base band component, to detect, based on this ideal base band component, a noise component contained in the digital modulation signal, and to output (display) the spectrum of the detected noise component along with the spectrum of the base band component. The digital modulation signal measuring device can easily identify, while a digital modulation signal is actually being transmitted, the properties of a noise component contained in that digital modulation signal, thereby making it possible to easily estimate causes of the noise and improve a transmission quality.
Inventors:
ITAHARA HIROSHI (JP)
GOTOU YOSHIHIDE (JP)
GOTOU YOSHIHIDE (JP)
Application Number:
PCT/JP2000/002954
Publication Date:
November 16, 2000
Filing Date:
May 09, 2000
Export Citation:
Assignee:
ANRITSU CORP (JP)
ITAHARA HIROSHI (JP)
GOTOU YOSHIHIDE (JP)
ITAHARA HIROSHI (JP)
GOTOU YOSHIHIDE (JP)
International Classes:
H04B3/46; H04B1/10; H04B17/00; H04B17/10; H04B17/15; H04L1/20; H04L27/00; (IPC1-7): H04L27/00; H04B17/00
Foreign References:
| JPH04123639A | 1992-04-23 | |||
| EP0805573A2 | 1997-11-05 | |||
| EP0748056A2 | 1996-12-11 |
Other References:
See also references of EP 1096748A4
Attorney, Agent or Firm:
Suzuye, Takehiko (Kasumigaseki 3-chome Chiyoda-ku, Tokyo, JP)
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