SIGNAL SEARCH METHOD, SIGNAL SEARCH PROGRAM, SIGNAL SEARCH DEVICE, GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) SIGNAL RECEIVER, AND INFORMATION TERMINAL
Whether a target GPS signal is successfully captured is determined more accurately than the conventional method. Integrated correlation values are acquired with all code phases by setting a plurality of frequencies at intervals of 1,000 Hz determined based on a code cycle of a GPS signal into a sing...
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| creator | TADA, Kazuto OSUGI, Akihiro |
| description | Whether a target GPS signal is successfully captured is determined more accurately than the conventional method. Integrated correlation values are acquired with all code phases by setting a plurality of frequencies at intervals of 1,000 Hz determined based on a code cycle of a GPS signal into a single group (S101). A peak correlation value Peak(i) that is a highest integrated correlation value with each frequency i forming the group is acquired (S102). The peak correlation values Peak(i) of the respective frequencies i are compared to each other, a highest value thereof is set to be a highest peak value Tpeak, and a peak correlation value Peak(i) that is a second highest value is set to be a highest noise value Np. If a ratio Ratio between the highest peak value Tpeak and the highest noise value Np is lower than a threshold Th, it is determined that cross-correlation occurred (S104: YES), and if the ratio Ratio is higher than the threshold Th, the highest peak value Tpeak is determined to be from the target GPS signal (S104: NO), and the GPS signal is captured (S105). |
| format | Patent |
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Integrated correlation values are acquired with all code phases by setting a plurality of frequencies at intervals of 1,000 Hz determined based on a code cycle of a GPS signal into a single group (S101). A peak correlation value Peak(i) that is a highest integrated correlation value with each frequency i forming the group is acquired (S102). The peak correlation values Peak(i) of the respective frequencies i are compared to each other, a highest value thereof is set to be a highest peak value Tpeak, and a peak correlation value Peak(i) that is a second highest value is set to be a highest noise value Np. If a ratio Ratio between the highest peak value Tpeak and the highest noise value Np is lower than a threshold Th, it is determined that cross-correlation occurred (S104: YES), and if the ratio Ratio is higher than the threshold Th, the highest peak value Tpeak is determined to be from the target GPS signal (S104: NO), and the GPS signal is captured (S105).</description><language>eng ; fre ; ger</language><subject>ANALOGOUS ARRANGEMENTS USING OTHER WAVES ; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ; ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES ; MEASURING ; PHYSICS ; RADIO DIRECTION-FINDING ; RADIO NAVIGATION ; TESTING ; TRANSMISSION</subject><creationdate>2019</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20191127&DB=EPODOC&CC=EP&NR=2829895B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,778,883,25547,76298</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20191127&DB=EPODOC&CC=EP&NR=2829895B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>TADA, Kazuto</creatorcontrib><creatorcontrib>OSUGI, Akihiro</creatorcontrib><title>SIGNAL SEARCH METHOD, SIGNAL SEARCH PROGRAM, SIGNAL SEARCH DEVICE, GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) SIGNAL RECEIVER, AND INFORMATION TERMINAL</title><description>Whether a target GPS signal is successfully captured is determined more accurately than the conventional method. Integrated correlation values are acquired with all code phases by setting a plurality of frequencies at intervals of 1,000 Hz determined based on a code cycle of a GPS signal into a single group (S101). A peak correlation value Peak(i) that is a highest integrated correlation value with each frequency i forming the group is acquired (S102). The peak correlation values Peak(i) of the respective frequencies i are compared to each other, a highest value thereof is set to be a highest peak value Tpeak, and a peak correlation value Peak(i) that is a second highest value is set to be a highest noise value Np. 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Integrated correlation values are acquired with all code phases by setting a plurality of frequencies at intervals of 1,000 Hz determined based on a code cycle of a GPS signal into a single group (S101). A peak correlation value Peak(i) that is a highest integrated correlation value with each frequency i forming the group is acquired (S102). The peak correlation values Peak(i) of the respective frequencies i are compared to each other, a highest value thereof is set to be a highest peak value Tpeak, and a peak correlation value Peak(i) that is a second highest value is set to be a highest noise value Np. If a ratio Ratio between the highest peak value Tpeak and the highest noise value Np is lower than a threshold Th, it is determined that cross-correlation occurred (S104: YES), and if the ratio Ratio is higher than the threshold Th, the highest peak value Tpeak is determined to be from the target GPS signal (S104: NO), and the GPS signal is captured (S105).</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre ; ger |
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| subjects | ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING TRANSMISSION |
| title | SIGNAL SEARCH METHOD, SIGNAL SEARCH PROGRAM, SIGNAL SEARCH DEVICE, GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) SIGNAL RECEIVER, AND INFORMATION TERMINAL |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-17T08%3A15%3A30IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=TADA,%20Kazuto&rft.date=2019-11-27&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EEP2829895B1%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |