Title:
周波数分析方法、周波数分析装置及びスペクトラムアナライザ
Document Type and Number:
Japanese Patent JP4176479
Kind Code:
B2
Abstract:
There are provided frequency analyzing method and apparatus, and a spectrum analyzer capable of reliably detecting and displaying a radio wave even if the radio wave is a frequency spread or low level one. A signal to be measured existing in a frequency band to be measured is extracted by a plurality of measurement signal extracting devices, and each of the extracted plural signals to be measured is frequency analyzed to compute a correlation value with respect to the plural results of frequency analyses. If the computed correlation value is equal to or greater than a preset value, a decision that the signal to be measured exists in the analyzed frequency is rendered, and if the computed correlation value is smaller than the preset value, a decision that the signal to be measured does not exist in the analyzed frequency is rendered. The decision results are displayed.
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Inventors:
Kurosawa Makoto
Application Number:
JP2002572430A
Publication Date:
November 05, 2008
Filing Date:
March 13, 2002
Export Citation:
Assignee:
Advantest Corporation
Minister of Internal Affairs and Communications
Minister of Internal Affairs and Communications
International Classes:
G01R23/16; G06F17/10; G06F17/15
Domestic Patent References:
| JP53051872A | ||||
| JP63273015A | ||||
| JP2071182A | ||||
| JP3057924A | ||||
| JP4074985A | ||||
| JP6066853A | ||||
| JP9127237A | ||||
| JP9134113A | ||||
| JP10268034A | ||||
| JP11326496A | ||||
| JP2000304849A |
Other References:
今井 正樹、金井 浩、中鉢 憲賢、小黒 瞬、鈴木 英男,異なる周波数帯域成分間の相関性の定量的計測法,日本音響学会誌,日本,社団法人日本音響学会,1993年 6月 1日,Vol.49, No.6,pp. 389-396 ,ISSN:03694232
Attorney, Agent or Firm:
Naoki Nakao
Yukio Nakamura
Taku Kusano
Yukio Nakamura
Taku Kusano