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Machine translation
1. (WO1980002900) CONVERTER INCLUDED IN A PHASE MODULATOR
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/002900    International Application No.:    PCT/SE1979/000130
Publication Date: 24.12.1980 International Filing Date: 08.06.1979
IPC:
H04L 25/03 (2006.01), H04L 27/20 (2006.01)
Applicants:
Inventors:
Priority Data:
SE79/00130 08.06.1979 WO
Title (EN) CONVERTER INCLUDED IN A PHASE MODULATOR
(FR) CONVERTISSEUR INCLUS DANS UN MODULATEUR DE PHASE
Abstract: front page image
(EN)A converter is included in a modulator for phase modulation of data symbols ((Alpha)n) and converts the data symbols received each in one time interval to sequences of phase values ((Alpha)+(Alpha)n). Based on symbol correlation the present phase value sequence is calculated out of an arbitrary rational modulation index, of the present phase state ((Alpha)n) which is associated with a first number of symbols previously received and which defines a phase state number, and of a pulse response which extends over the present symbol and a second number of preceding symbols. There exists a finite number of phase value sequences which are stored in digital form in a memory arrangement (MA) and each accessible with an associated address. Any arbitrary sequence of data symbols results in continuous phase transition. A calculating unit (CU) calculates during each time interval a phase state number (vn). The memory arrangement comprises an access unit to generate the address, which is determined by the present data symbol, by the previously mentioned second number of preceding symbols and by the last phase state number received from the calculating unit.
(FR)Un convertisseur est inclus dans un modulateur de en modulation de phase de symboles de donnees ((Alpha)n et convertit les symboles de donnees recues chacun dans un intervalle de temps en sequences de valeurs de phase ((Alpha)+(Alpha)n). Basee sur la correlation des symboles, la presente sequence des valeurs de phases est calculee a partir d"un index de modulation rationnel arbitraire, du present etat de phase ((Alpha)n) qui est associe a un premier nombre de symboles recus anterieurement et qui definit un nombre d"etat de phase, et d"une reponse d"impulsions qui s"etend sur le present symbole et un second nombre de symboles precedents. Il existe un nombre fini de sequences de valeur de phase qui sont emmagasinees sous forme digitale dans un dispositif de memoire (MA), chacune d"elles etant accessible avec une adresse associee. N"importe quelle sequence arbitraire de symboles de donnees resulte en des transitions continues de phase. Une unite de calcul (CU) calcule pendant chaque intervalle de temps un nombre d"etat de phase (vn). Le dispositif de memoire comprend une unite d"acces pour engendrer l"adresse, laquelle est determinee par le symbole de donnee present, par le second nombre de symboles precedents mentionne auparavant et par le dernier nombre d"etat de phase recu depuis l"unite de calcul.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)