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Machine translation
1. (WO2002029994) SEARCHING FOR SIGNALS IN A COMMUNICATIONS SYSTEM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2002/029994    International Application No.:    PCT/EP2001/011082
Publication Date: 11.04.2002 International Filing Date: 25.09.2001
Chapter 2 Demand Filed:    26.04.2002    
IPC:
H04B 1/7075 (2011.01), H04B 1/712 (2011.01)
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) [SE/SE]; S-126 25 Stockholm (SE) (For All Designated States Except US).
CARLSSON, Torsten [SE/SE]; (SE) (For US Only).
GUSTAFSSON, Kjell [SE/SE]; (SE) (For US Only).
ATARIUS, Roozbeh [SE/US]; (US) (For US Only).
ERIKSSON, Håkan [SE/SE]; (SE) (For US Only).
ÖSTBERG, Christer [SE/SE]; (SE) (For US Only).
PALENIUS, Torgny [SE/SE]; (SE) (For US Only)
Inventors: CARLSSON, Torsten; (SE).
GUSTAFSSON, Kjell; (SE).
ATARIUS, Roozbeh; (US).
ERIKSSON, Håkan; (SE).
ÖSTBERG, Christer; (SE).
PALENIUS, Torgny; (SE)
Agent: ERICSSON MOBILE PLATFORMS AB; IPR Dept., S-221 83 LUND (SE)
Priority Data:
09/678,165 02.10.2000 US
Title (EN) SEARCHING FOR SIGNALS IN A COMMUNICATIONS SYSTEM
(FR) RECHERCHE DE SIGNAUX DANS UN SYSTEME DE COMMUNICATIONS
Abstract: front page image
(EN)A method and system enable matched filters of a CDMA system to be simplified using a two stage search. A course stage and a fine stage jointly produce the locations(s) of received signal path-rays. In a first stage, an oversampled digital signal (240) is decimated, and the decimated signal (415) is applied to a matched filter (420) to eventually produce an approximate location (460). In a second stage, the oversampled signal (240) is shifted based on the determined approximate location (460) and then correlated to a generated code (440), and a more-exact location is selected from the outputs of the correlations (450). Alternatively, a shifted version of the generated code (440) is correlated to the oversampled signal (240), and the more-exact location is selected from the outputs of those correlations (450).
(FR)L'invention concerne un procédé et un système qui permettent de simplifier des filtres adaptés d'un système AMRC à l'aide d'une recherche en deux temps. Une étape grossière et une étape fine produisent conjointement les emplacements des rayons de parcours de signaux reçus. Dans une première étape, un signal numérique suréchantillonné (240) est décimé. Ce signal décimé (415) est ensuite appliqué à un filtre adapté (420) afin de finalement produire un emplacement approximatif (460). Dans une seconde étape, le signal suréchantillonné (240) est décalé sur la base de l'emplacement approximatif déterminé (460), puis il est corrélé à un code généré (440) et un emplacement plus exact est choisi parmi les sorties des corrélations (450). Dans une variante, une version décalée du code généré (440) est corrélée au signal suréchantillonné (240) et l'emplacement plus exact est choisi parmi les sorties de ces corrélations (450).
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PH, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)