Title:
METHOD FOR TRACKING SIGNAL
Document Type and Number:
Japanese Patent JP2607854
Kind Code:
B2
Abstract:
PURPOSE: To improve the tracking accuracy by tracking narrow band signals without being influenced by noises.
CONSTITUTION: A narrow band signal S1 from an unknown target 1 is received by an acoustic array sensor 2 with a plurality of receiving beams directed in slightly different azimuths. A signal intensity distribution S3-i on the frequency space of the receiving signal with the receiving beam Bi is obtained every sampling time, which is stored by a memory device 4-i. A part in the vicinity of a sampling frequency is taken out by a neural network 5 according to a calculation of the time × signal intensity distribution on the frequency space, thereby deciding whether a linear or curved pattern by the narrow band signal from the unknown target 1 is present. The frequency and azimuth of the narrow band signal are tracked by a target-managing device 6. The accurately measured azimuth and accurately measured frequency of the target 1 are detected by a peak detector 7.
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Inventors:
Takahiro Kato
Naoto Honma
Daido Katsugi
Yamashita Masato
Ryo Mizoda
Shunji Ozaki
Naoto Honma
Daido Katsugi
Yamashita Masato
Ryo Mizoda
Shunji Ozaki
Application Number:
JP26854594A
Publication Date:
May 07, 1997
Filing Date:
November 01, 1994
Export Citation:
Assignee:
Director General, Technical Research Division, Defense Agency
Oki Electric Industry Co., Ltd.
Oki Electric Industry Co., Ltd.
International Classes:
G06F15/18; G01S3/802; G01S3/808; G06N3/00; (IPC1-7): G01S3/802; G01S3/808
Domestic Patent References:
| JP643238A | ||||
| JP815402A |
Attorney, Agent or Firm:
Kakimoto Kyosei