Symbol of the Government of Canada

Canadian Patents Database

Some of the information on this Web page has been provided by external sources. The Government of Canada is not responsible for the accuracy, reliability or currency of the information supplied by external sources. Users wishing to rely upon this information should consult directly with the source of the information. Content provided by external sources is not subject to official languages, privacy and accessibility requirements.

Patent Summary

(12) Patent: (11) CA 2165420
(54) English Title: SYSTEM AND METHOD FOR MODULATING A CARRIER FREQUENCY
(54) French Title: SYSTEME ET METHODE DE MODULATION DE FREQUENCE DE PORTEUSE

Abstracts

English Abstract






A carrier frequency modulating system and method for producing a modulated carrier frequency is disclosed. The system comprises
a carrier frequency signal generator (23) for producing a carrier frequency signal at a carrier frequency at an output (42) thereof. The
system further comprises a sequencer (32) for producing a modulation signal at an output (35) thereof. This modulation signal comprises a
plurality of modulation signal portions (68, 68) separated by at least one null modulation signal portion (69) having a corresponding time
length. The system is provided with a modulator (46) for producing a modulated carrier frequency signal at an output (76) thereof. The
modulator (76) has a first input (44) connected to the output (42) of the carrier frequency signal generator (23) for receiving the carrier
frequency signal, and has a second input (48) for receiving the modulation signal. The system further comprises a power supply unit (55)
for supplying electrical power to the carrier frequency signal generator (23). The sequencer (32) is connected to the carrier frequency signal
generator (23) for controlling the activation thereof and to interrupt the carrier frequency signal generator (23) instead of modulating the
null modulation signal portion during the corresponding time length, whereby power consumption of the system is minimized.


French Abstract

L'invention concerne un système et un procédé qui permettent de produire une fréquence porteuse modulée. Le système comprend un générateur (23) de signal de fréquence porteuse qui produit un tel signal à une fréquence porteuse au niveau d'une sortie (42). Ce système comporte aussi un séquenceur (32) qui produit un signal de modulation au niveau d'une sortie (35). Ce signal de modulation comprend plusieurs parties (68) séparées par au moins une partie (69) de signal à modulation nulle émise pendant une durée correspondante. Ce système comporte un modulateur (46) qui produit au niveau d'une sortie (76) un signal de fréquence porteuse modulée. Ce modulateur (76) présente une première entrée (44), connectée à la sortie (42) du générateur (23) de signal de fréquence porteuse (23), afin de recevoir ce signal, et il présente une deuxième entrée (48) destinée à recevoir le signal de modulation. Le système comprend en outre une unité d'alimentation (55) qui fournit l'énergie électrique au générateur (23) de signal de fréquence porteuse. Le séquenceur (32), connecté à ce générateur (23), en commande l'activation et l'interrompt plutôt que de moduler la partie de signal à modulation nulle, pendant sa durée correspondante, ce qui permet de réduire la consommation d'énergie du système.



Patent Details

(51) International Patent Classification (IPC):
  • H03C 5/00 (2006.01)
  • G01S 1/02 (2006.01)
(72) Inventors (Country):
  • LABRECHE, LOUIS (Canada)
  • LEPAGE, JEAN-PIERRE (Canada)
(73) Owners (Country):
  • THE CANADIAN SPACE AGENCY, AN AGENCY OF THE GOVERNMENT OF CANADA (Canada)
(71) Applicants (Country):
  • THE CANADIAN SPACE AGENCY, AN AGENCY OF THE GOVERNMENT OF CANADA (Canada)
(74) Agent: FRENCH, DAVID J.
(45) Issued: 2003-12-16
(86) PCT Filing Date: 1994-06-17
(87) PCT Publication Date: 1995-01-05
Examination requested: 1998-11-09
(30) Availability of licence: N/A
(30) Language of filing: English

(30) Application Priority Data:
Application No. Country Date
220,215 United States of America 1994-03-30
2,120,077 Canada 1993-06-17

View or Download Images

Click on a link under View Patent Image to view a section of the image or click on a link under Download Patent Image in PDF format to download a section of the image in PDF format.

If you have any difficulty accessing content, you can call the Client Service Centre at 1-866-997-1936 or send them an e-mail at CIPO Client Service Centre.

View Patent Image Download Patent Image in PDF Format Size of Image (KB) Number of Pages
Cover Page Cover Page 56 1
Abstract Abstract 65 1
Claims Claims 1,284 30
Description Description 1,525 34
Drawings Drawings 228 10
Representative Drawing Representative Drawing 11 1

PDF Readers.