Processing

Please wait...

Settings

Settings

1. WO1996005652 - COMMUNICATION DEVICE WITH EFFICIENT MULTI-LEVEL DIGITAL DEMODULATOR

Publication Number WO/1996/005652
Publication Date 22.02.1996
International Application No. PCT/US1995/010369
International Filing Date 14.08.1995
Chapter 2 Demand Filed 19.01.1996
IPC
H03D 3/00 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
3Demodulation of angle-modulated oscillations
H03D 7/16 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
7Transference of modulation from one carrier to another, e.g. frequency-changing
16Multiple frequency-changing
H04L 27/233 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
18Phase-modulated carrier systems, i.e. using phase-shift keying
22Demodulator circuits; Receiver circuits
233using non-coherent demodulation
CPC
H03D 2200/0064
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
2200Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
0041Functional aspects of demodulators
0064Detection of passages through null of a signal
H03D 3/007
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
3Demodulation of angle-, ; frequency- or phase-; modulated oscillations
007by converting the oscillations into two quadrature related signals
H03D 7/165
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
7Transference of modulation from one carrier to another, e.g. frequency-changing
16Multiple-frequency-changing
165at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
H04L 27/2332
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
18Phase-modulated carrier systems, i.e. using phase-shift keying
22Demodulator circuits
233using non-coherent demodulation
2332using a non-coherent carrier
Applicants
  • MOTOROLA INC. [US/US]; 1303 East Algonquin Road Schaumburg, IL 60196, US
Inventors
  • LEE, Edward, K., B.; US
Agents
  • GHOMESHI, M., Mansour ; Motorola Inc. Intellectual Property Dept. 8000 West Sunrise Boulevard Fort Lauderdale, FL 33322, US
Priority Data
08/290,57815.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) COMMUNICATION DEVICE WITH EFFICIENT MULTI-LEVEL DIGITAL DEMODULATOR
(FR) DISPOSITIF DE COMMUNICATION A DEMODULATEUR NUMERIQUE A NIVEAUX MULTIPLES EFFICACES
Abstract
(EN)
A communication device (100) includes mixers (104 and 108) which mix a local oscillator (112, 106) with a received signal to produce in-phase (i) and quadrature (q) components. The direction of the phase of the signal is detected at the i and q zero crossings. Next, the speed with which the phase rotation angle travels from one zero crossing to another is monitored via a controller (126). The controller (126) manipulates the speed and the direction of the phase rotation angle in order to establish the contents of the received information signal.
(FR)
Dispositif de communication (100) comprenant des mixeurs (104 et 108) qui mélangent un oscillateur local (112, 106) avec un signal capté pour obtenir des composantes de quadrature (q) et des composantes en phase (i). Le sens de phase du signal est détecté lors des franchissements du zéro en i et en q. Ensuite, la vitesse selon laquelle l'angle de rotation de phase se déplace d'un franchissement de zéro à un autre est observée à l'aide d'un régisseur (126). Ce régisseur agit sur la vitesse et le sens de l'angle de rotation de phase, afin d'établir le contenu du signal d'information capté.
Latest bibliographic data on file with the International Bureau