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1. (WO1997017773) NON-LINEARITY ESTIMATION METHOD AND DEVICE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/017773 International Application No.: PCT/FR1996/001755
Publication Date: 15.05.1997 International Filing Date: 07.11.1996
IPC:
H03F 1/32 (2006.01) ,H04B 10/50 (2013.01) ,H04B 10/58 (2013.01)
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
F
AMPLIFIERS
1
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
32
Modifications of amplifiers to reduce non-linear distortion
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
10
Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
50
Transmitters
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
10
Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
50
Transmitters
58
Compensation for non-linear transmitter output
Applicants:
THOMSON BROADCAST SYSTEMS [FR/FR]; 17, rue du Petit-Albi Boîte postale 8244 F-95801 Cergy-Pontoise Cédex, FR (AllExceptUS)
HERGAULT, Stéphane [FR/FR]; FR (UsOnly)
HARDY, Patrick [FR/FR]; FR (UsOnly)
Inventors:
HERGAULT, Stéphane; FR
HARDY, Patrick; FR
Agent:
RUELLAN-LEMONNIER, Brigitte; Thomson multimedia F-92050 Paris-La Défense Cédex, FR
Priority Data:
95/1328209.11.1995FR
Title (EN) NON-LINEARITY ESTIMATION METHOD AND DEVICE
(FR) PROCEDE ET DISPOSITIF D'ESTIMATION DE NON-LINEARITE
Abstract:
(EN) A method wherein pilot signals (10) generated upstream from a device (11) of which the non-linearity is to be measured pass through a known non-linear device (15) providing intermodulation products of known characteristics, and wherein at least one of the known intermodulation products is used to modulate, by means of synchronous sensing circuits (17), at least one of the signals relating to the components of the intermodulation products of the device to be measured. The method and device are useful for the analog transmission of television signals on optical fibres.
(FR) Le procédé est caractérisé en ce que les signaux pilotes (10) générés en amont du dispositif (11) dont on veut mesurer la non-linéarité traversent un dispositif non-linéaire connu (15) fournissant des produits d'intermodulation de caractéristiques connues et en ce qu'au moins un des produits d'intermodulation connus est exploité pour moduler, à l'aide de circuits de détection synchrone (17), au moins un des signaux relatifs aux composantes des produits d'intermodulation du dispositif à mesurer. Les applications vont à la transmission analogique de signaux de télévision sur fibres optiques.
Designated States: JP, US
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: French (FR)
Filing Language: French (FR)
Also published as:
EP0835559US6108351JPH10512735