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:
Nov. 09, 2004
Filed:
Aug. 17, 2001
Sergey L. Dickey, Fairfax, VA (US);
PCTel Maryland, Inc., Chicago, IL (US);
Abstract
A method and apparatus tests CDMA signal propagation and coverage. A pn scan is first made of the pilot channel to be measured. The signal to total power ratio, Ec/Io is calculated. A frequency scan is made of the reception frequency close in time to the pn scan. The frequency scan results are used to identify and quantify any interference adjacent and coincident with the CDMA channel of interest. The power of the interfering transmissions are weighted, interfering signals with frequencies close or within the CDMA channel of interest are given heavier weights. Removing weighted value of the interfering signals modifies and reduces the value of Io. An adjusted Ec/Io is calculated to reflect the modified Io value, thus resulting in an approximation of the Ec/Io value at the transmission site. The sources of interference can be reported to the CDMA carrier for remedial attention.