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1. (WO1991008616) FREQUENCY MULTIPLEXER/DEMULTIPLEXER FOR DIGITALLY REPRESENTED SIGNALS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/008616 International Application No.: PCT/NO1990/000175
Publication Date: 13.06.1991 International Filing Date: 29.11.1990
IPC:
H03H 17/02 (2006.01) ,H04L 5/06 (2006.01)
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
H
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
17
Networks using digital techniques
02
Frequency-selective networks
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
5
Arrangements affording multiple use of the transmission path
02
Channels characterised by the type of signal
06
the signals being represented by different frequencies
Applicants:
FROBE RADIO AS [NO/NO]; Prof Brochs gt 6 N-7030 Trondheim, NO (AllExceptUS)
BAKKEN, Petter, M. [NO/NO]; NO (UsOnly)
Inventors:
BAKKEN, Petter, M.; NO
Priority Data:
89475029.11.1989NO
Title (EN) FREQUENCY MULTIPLEXER/DEMULTIPLEXER FOR DIGITALLY REPRESENTED SIGNALS
(FR) MULTIPLEXEUR/DEMULTIPLEXEUR DE FREQUENCE POUR SIGNAUX A REPRESENTATION NUMERIQUE
Abstract:
(EN) A procedure to split a frequency division signal represented by digital complex sample values into two separate signals depending on frequency by using two frequency selective filters is described in detail. The procedure applies multiplication of every second input samples with real numbers. Subsequently the remaining sample values and the resulting products are subject to simple operations as delay, change of sign, interchanges and addition until the desired values for the output samples are obtained. A corresponding procedure to combine two signals is also described. This procedure can be derived from the procedure for dividing the signals.
(FR) Procédé pour fractionner un signal de répartition en fréquence représenté par des valeurs échantillons complexes numériques en deux signaux distincts en fonction de la fréquence au moyen de deux filtres sélectifs en fréquence. Pour ce faire, on multiplie les échantillons d'une entrée sur deux avec des nombres réels. Les valeurs échantillons restantes et les produits obtenus sont ensuite soumis à des opérations simples, par exemple retard, changement de signe, permutations et addition, jusqu'à ce que l'on obtienne les valeurs souhaitées pour les échantillons de sortie. La présente invention décrit en outre un procédé correspondant pour la combinaison de deux signaux, qui peut découler du procédé de fractionnement décrit ci-dessus.
Designated States: AT, AU, BB, BG, BR, CA, CH, DE, DK, ES, FI, GB, HU, JP, KP, KR, LK, LU, MC, MG, MW, NL, NO, RO, SD, SE, SU, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CM, GA, ML, MR, SN, TD, TG)
Publication Language: English (EN)
Filing Language: Norvegian (NO)
Also published as:
AU1991068881