Processing

Please wait...

Settings

Settings

1. WO2000041374 - COMPUTER METHOD AND APPARATUS FOR MODEM POINT SLICING

Publication Number WO/2000/041374
Publication Date 13.07.2000
International Application No. PCT/US1999/030896
International Filing Date 23.12.1999
Chapter 2 Demand Filed 10.07.2000
IPC
H04L 25/06 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
06Dc level restoring means; Bias distortion correction
H04L 27/38 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
32Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18, or H04L27/26213
34Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
38Demodulator circuits; Receiver circuits
CPC
H04L 25/067
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
06Dc level restoring means; Bias distortion correction ; decision circuits providing symbol by symbol detection
067providing soft decisions, i.e. decisions together with an estimate of reliability
H04L 27/38
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
32Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
34Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
38Demodulator circuits; Receiver circuits
Applicants
  • DSP SOFTWARE ENGINEERING, INC. [US/US]; 175 Middlesex Turnpike Bedford, MA 01730, US
Inventors
  • TANRIKULU, Oguz; US
Agents
  • WAKIMURA, Mary, Lou ; Hamilton, Brook, Smith & Reynolds, P.C. Two Militia Drive Lexington, MA 02421, US
Priority Data
09/224,61931.12.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) COMPUTER METHOD AND APPARATUS FOR MODEM POINT SLICING
(FR) METHODE SUR ORDINATEUR ET APPAREILLAGE DE DECOUPAGE PAR POINT POUR MODEM
Abstract
(EN)
The present invention is a computer method and apparatus of point slicing in digital communication systems employing Quadrature Amplitude Modulation (QAM). This method comprises the steps of providing an infinite lattice, receiving at least one subset of soft point, defining at least one valid constellation boundary, determining a closest valid constellation hard point for each soft point in the subsets of soft points, and reporting the closest valid constellation hard point.
(FR)
La présente invention concerne une méthode sur ordinateur et un appareillage de découpage par point dans des systèmes de communication numérique utilisant la modulation d'amplitude en quadrature de phase (QAM). Cette méthode consiste à établir un réseau infini, à recevoir au moins un sous-ensemble de points diffus, à définir au moins une frontière de constellation valide, à déterminer, pour chaque point diffus des sous-ensembles de points diffus, le plus proche point précis de constellation valide, et à exploiter ce point.
Latest bibliographic data on file with the International Bureau