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:
Oct. 26, 2004
Filed:
May. 01, 2001
Min Soo Jung, Seoul, KR;
Hyundai Electronics Ind. Co., Ltd., Kyungki-Do, KR;
Abstract
Disclosed is a CDMA (Code Division Multiple Access) code timing tracking apparatus capable of exact code timing synchronization without regard to signal gain change by normalizing signal gain to synchronize code timing. The CDMA code timing tracking apparatus correlates each code generated from a PN code generator, which generates on-time code, early code being faster than the on-time code and late code being later than the on-time code, with CDMA signal, low-pass filters output signal of a plurality of correlators with first to third low-pass filters and quantizes output signal of the first low-pass filter. Furthermore, the CDMA code timing tracking apparatus subtracts output signal of the third low-pass filter from output signal of the second low-pass filter, generates difference signal, divides the difference signal by output signal of a quantizer and generates the resulted value as error signal to compensate error, thereby obtaining exact CDMA code timing tracking without regard to the size of input signal.