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. 13, 2006
Filed:
Jun. 24, 2002
Jacob Schelm, Pardes Hanna, IL;
Ophir Shabtay, Haifa, IL;
Yaniv Avital, Jerusalem, IL;
Ehud Reshef, Qiryat Tivon, IL;
Jacob Schelm, Pardes Hanna, IL;
Ophir Shabtay, Haifa, IL;
Yaniv Avital, Jerusalem, IL;
Ehud Reshef, Qiryat Tivon, IL;
Comsys Communication & Signal Processing Ltd., Herzelia, IL;
Abstract
A method and apparatus for estimating channel tap delays of multipath components in a CDMA received signal. The search for the tap delays are split into two phases namely, a phaseand a phasesearch. The phasesearch is a coarse resolution quick search adapted to generate a rough estimate of the location of the tap delays. During this phase, the candidate codes are summed and the input signal correlated with the code sum creating an ambiguity in the code associated with the multipath. A finer resolution slower phasesearch resolves the code ambiguity present in the initial rough estimates of the phasesearch. Additional phasecorrelations may be performed to implement a code-tracking loop.