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1. WO2002023783 - MASSIVELY PARALLELED SEQUENTIAL TEST ALGORITHM

Publication Number WO/2002/023783
Publication Date 21.03.2002
International Application No. PCT/US2001/028998
International Filing Date 12.09.2001
IPC
G01S 1/00 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
1Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
CPC
G01S 19/29
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
19Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
01Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
13Receivers
24Acquisition or tracking ; or demodulation; of signals transmitted by the system
29carrier ; including Doppler,; related
G01S 19/30
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
19Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
01Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
13Receivers
24Acquisition or tracking ; or demodulation; of signals transmitted by the system
30code related
G01S 19/37
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
19Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
01Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
13Receivers
35Constructional details or hardware or software details of the signal processing chain
37Hardware or software details of the signal processing chain
H04B 1/70735
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
707using direct sequence modulation
7073Synchronisation aspects
70735Code identification
H04B 1/70755
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
707using direct sequence modulation
7073Synchronisation aspects
7075with code phase acquisition
70755Setting of lock conditions, e.g. threshold
H04B 1/708
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
69Spread spectrum techniques
707using direct sequence modulation
7073Synchronisation aspects
7075with code phase acquisition
708Parallel implementation
Applicants
  • INTERSTATE ELECTRONICS CORPORATION [US]/[US]
Inventors
  • VAN WECHEL, Robert, J.
Agents
  • ALTMAN, Daniel, E.
Priority Data
09/659,64712.09.2000US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MASSIVELY PARALLELED SEQUENTIAL TEST ALGORITHM
(FR) ALGORITHME D'ESSAI SEQUENTIEL RENDU MASSIVEMENT PARALLELE
Abstract
(EN)
An apparatus and method (200) allow receivers to quickly acquire a pseudorandom noise signal. A receiver advantageously detects frequency shifts using a compact parallel process hardware implementation (202, 204, 208, 210) of a Discrete Fourier Transform (DFT)(208). The method applies a sequential test algorithm to the detection of a correlation signal. The method allows the receiver to search a range of frequency-time space relatively quickly.
(FR)
Cette invention a trait à un appareil (200), ainsi qu'à la méthode correspondante, permettant à des récepteurs d'acquérir rapidement un signal de bruit pseudo-aléatoire. Un récepteur détecte avantageusement des déplacements de fréquence par réalisation matérielle d'un processus de traitement parallèle compact (202, 204, 208, 210) d'une transformée de Fourier discrète (DFT) (208). Cette méthode applique un algorithme d'essai séquentiel pour la détection d'un signal de corrélation. Cette méthode permet au récepteur de rechercher une gamme d'espace fréquentiel/temporel et ce, relativement rapidement.
Also published as
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