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:
Feb. 17, 2015
Filed:
Mar. 11, 2013
Applicant:
Commissariat a L'energie Atomique ET Aux Ene Alt, Paris, FR;
Inventor:
Mathieu Bouvier Des Noes, Grenoble, FR;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 1/00 (2006.01); H04B 15/00 (2006.01); H04B 1/7073 (2011.01); H04L 1/00 (2006.01);
U.S. Cl.
CPC ...
H04B 15/00 (2013.01); H04B 1/70735 (2013.01); H04L 1/005 (2013.01); H04L 1/0054 (2013.01); H04L 2001/0092 (2013.01);
Abstract
A method for estimating a scrambling code used on the uplink of a CDMA 2000 system. The received signal is firstly sampled at twice the chip frequency of the spreading code, and then filtered with a filter adapted to the spreading code and to pulse shaping. Differential processing of the successive samples is applied on the signal thus filtered and the differential values thus obtained are decoded using iterative belief propagation decoding. The decoded values are then used to determine the content of the shift register of the scrambling code generator at a given instant.