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Machine translation
1. (WO1981001930) INTERFERING-WAVE ELIMINATION DEVICE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/001930    International Application No.:    PCT/JP1979/000326
Publication Date: 09.07.1981 International Filing Date: 26.12.1979
IPC:
G01S 1/04 (2006.01), G01S 1/24 (2006.01), H04B 1/10 (2006.01)
Applicants:
Inventors:
Priority Data:
JP79/00326 26.12.1979 WO
Title (EN) INTERFERING-WAVE ELIMINATION DEVICE
(FR) DISPOSITIF D"ELIMINATION D"ONDES D"INTERFERENCE
Abstract: front page image
(EN)An interfering-wave elimination device includes a narrow-bandpass elimination filter (17), provided in the received signal path (16) of signal processing device (15) such as a Loran C receiver, the eliminated frequency of which can be adjusted automatically to coincide with an interfering wave, e.g., a radio wave from a Decca navigation system. First, switch (32) is changed over to the control signal generator (31) and the eliminated frequency is set nearly equal to the interfering-wave frequency by adjusting the control signal generator (31), such that a minimum indication is given on indicator (29) which indicates the intensity of the interfering wave which has passed through the narrow-band-pass filter (17). There is provided a phase comparator (27) which compares the phases of the input and output of the narrow-band-pass filter (17) and delivers an output signal corresponding to the difference between the eliminated- and the interfering-wave-frequencies. Next, the switch (32) is changed over to the output terminal of the phase comparator (27), according to the output of which the eliminated frequency of the narrow-band-pass filter (17) is automatically controlled to coincide with the interfering-wave frequency.
(FR)Un dispositif d"elimination d"ondes d"interference comprend un filtre d"elimination de bandes passantes etroites (17), monte dans le passage de signaux recus (16) d"un dispositif de traitement de signaux (15) tel qu"un recepteur Loran (C), dont la frequence eliminee peut etre ajustee automatiquement pour coincider avec une onde d"interference, p.ex., une onde radio provenant d"un systeme de navigation Decca. Tout d"abord, un commutateur (32) est commute sur le generateur de signaux de commande (31) et la frequence eliminee est reglee presque egale a la frequence de l"onde d"interference en ajustant le generateur de signaux de commande (31), de telle sorte qu"une indication minimum est donnee sur l"indicateur (29) qui indique l"intensite de l"onde d"interference qui est passee au travers du filtre de bandes passantes etroites (17). Un comparateur de phases (27) compare les phases de l"entree et de la sortie du filtre de bandes passantes etroites (17) et fournit un signal de sortie correspondant a la difference entre les frequences eliminees et les frequences d"ondes d"interference. Ensuite, le commutateur (32) est commute sur la borne de sortie du comparateur de phases (27), selon laquelle la frequence eliminee du filtre de bandes passantes etroites (17) est automatiquement commandee pour coincider avec la frequence d"ondes d"interference.
Designated States:
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)