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Machine translation
1. (WO1980001030) MOBILE RADIOTELEPHONE STATION TWO-WAY RANGING SYSTEM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/001030    International Application No.:    PCT/US1979/000887
Publication Date: 15.05.1980 International Filing Date: 24.10.1979
IPC:
H04B 7/26 (2006.01), H04W 64/00 (2009.01)
Applicants:
Inventors:
Priority Data:
959095 09.11.1978 US
Title (EN) MOBILE RADIOTELEPHONE STATION TWO-WAY RANGING SYSTEM
(FR) SYSTEME DE TELEMETRIE A DEUX VOIES POUR STATION TELEPHONIQUE MOBILE
Abstract: front page image
(EN)Some cellular mobile radiotelephone systems use tones for certain call connection supervisory functions on radio links. The presence of the correct tone in a received radio channel call signal is determined by using the received signal for producing (32) a lower frequency tone that is readily selectable (36) from similar tones produced in response to incorrect supervisory tones. The same received call signal is also separately processed to produce (41, 53) supervisory tone phase information that is indicative of range between communicating stations. Several circuits (72; 40 and 46; 59-62) are shown for enhancing the accuracy of the produced phase information of the correct tone.
(FR)Certains systemes radiotelephoniques mobiles cellulaires utilisent des tonalites pour certaines fonctions de controle de connexion d"appels sur des liaisons radio. La presence de la tonalite correcte dans un signal d"appel de canal radio recus est determine en utilisant le signal recu pour produire (32) une tonalite de frequence plus basse qui soit facilement selectionnee (36) parmi des tonalites identiques produit en reponse a des tonalites de controle ou de surveillance incorrectes. Le meme signal d"appels recus est egalement traite de maniere separee pour produire (41, 53) une information en phase de tonalite de controle qui indique la portee entre les stations de communication. Plusieurs circuits (72; 40 et 46; 59-62) ameliorent la precision de l"information de phases produites de la tonalite correcte.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)