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1. (WO1991007036) DIVERSITY RECEIVER IN A CDMA CELLULAR TELEPHONE SYSTEM
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/007036 International Application No.: PCT/US1990/006417
Publication Date: 16.05.1991 International Filing Date: 05.11.1990
Chapter 2 Demand Filed: 30.05.1991
IPC:
H04B 1/707 (2006.01) ,H04L 1/06 (2006.01) ,H04Q 7/30 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
1
Details of transmission systems, not covered by a single one of groups H04B3/-H04B13/123; Details of transmission systems not characterised by the medium used for transmission
69
Spread spectrum techniques
707
using direct sequence modulation
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
02
by diversity reception
06
using space diversity
(Deprecated)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
Q
SELECTING
7
Selecting arrangements to which subscribers are connected via radio links or inductive links
20
in which the radio or inductive links are two-way links, e.g. mobile radio systems
30
Base station equipment
Applicants:
QUALCOMM INCORPORATED [US/US]; 10555 Sorrento Valley Road San Diego, CA 92121, US
Inventors:
GILHOUSEN, Klein, S.; US
PADOVANI, Roberto; US
WHEATLEY, Charles, E., III; US
Agent:
BROWN, Carl, R. ; Brown, Martin, Haller and McClain 110 West "C" Street Suite 1300 San Diego, CA 92101, US
Priority Data:
432,55207.11.1989US
Title (EN) DIVERSITY RECEIVER IN A CDMA CELLULAR TELEPHONE SYSTEM
(FR) RECEPTEUR EN DIVERSITE POUR UN SYSTEME TELEPHONIQUE CELLULAIRE ET A ACCES MULTIPLE PAR DIFFERENCE DE CODES
Abstract:
(EN) A spread spectrum receiver subsystem for utilization in a CDMA cellular telephone having a searcher receiver (44) for scanning the time domain so as to use the PN processing gain and time discrimination properties of spread spectrum coding to determine the location in the time domain and the received signal strength of multiple receptions of a pilot signal traveling upon one or more physical propagation paths to reception. The searcher receiver (44) provides a control signal indicative of the received pilot signals of greatest strength and corresponding time relationship. A data receiver (40, 42) receives spread spectrum communication signals accompanying each received pilot signal and is responsive to the searcher control signal for acquiring and demodulating a spread spectrum communication signal, concomitant with the pilot signal of greatest signal strength, and thus providing a corresponding encoded output signal bearing information.
(FR) Sous-système récepteur à spectre dispersé destiné à l'utilisation dans un téléphone cellulaire et à accès multiple par différence de code possédant un récepteur rechercheur (44) servant à balayer la dimension temporelle afin d'utiliser le gain résultant du traitement à PB et les caractéristiques de discrimination dans le teemps du codage à spectre dispersé pour déterminer l'emplacement dans la dimension temporelle et la puissance du signal reçu lors du multiples réceptions d'un signal pilote parcourant un ou plusieurs trajets de propagation vers la réception. Le récepteur rechercheur (44) produit un signal de commande représentatif des signaux pilotes reçus dont les forces et la relation temporelle correspondante sont les plus élevées. Un récepteur de données (40, 42) reçoit des signaux de communication à spectre dispersé accompagnant chaque signal pilote reçu, et réagit au signal de commande rechercheur afin d'acquérir et de démoduler un signal de communication à spectre dispersé, concomitant du signal pilote dont la force est la plus élevée, et peut ainsi produire un signal de sortie codé et correspondant porteur d'informations.
Designated States: AU, BG, BR, CA, FI, HU, JP, KP, KR, NO, RO, SU
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
FI922082NO19921794IL96220ZA1990/08856EP0500761JP3073767
JPH04502844CA2072876KR1019920702129AU1991068748DK0500761MYPI 90001952