The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2006
Filed:
Oct. 02, 2000
Roozbeh Atarius, Cary, NC (US);
Håkan Eriksson, Lund, SE;
Torgny Palenius, Löddeköpinge, SE;
Christer Östberg, Staffanstorp, SE;
Torsten Carlsson, Lund, SE;
Kjell Gustafsson, Lund, SE;
Roozbeh Atarius, Cary, NC (US);
Håkan Eriksson, Lund, SE;
Torgny Palenius, Löddeköpinge, SE;
Christer Östberg, Staffanstorp, SE;
Torsten Carlsson, Lund, SE;
Kjell Gustafsson, Lund, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A method and system enables matched filters of a CDMA system to be simplified using a two stage search. A course stage and a fine stage jointly produce the location(s) of received signal path-rays. In a first stage, an oversampled digital signal is decimated, and the decimated signal is applied to a matched filter to eventually produce an approximate location. In a second stage, the oversampled signal is shifted based on the determined approximate location and then correlated to a generated code, and a more-exact location is selected from the outputs of the correlations. Alternatively, a shifted version of the generated code is correlated to the oversampled signal, and the more-exact location is selected from the outputs of those correlations.