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:
Dec. 07, 2004
Filed:
Sep. 12, 2001
Farrokh Abrishamkar, San Diego, CA (US);
Mark Roh, San Diego, CA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
A system determines if a primary paging channel should be received based on an examination of a quick paging channel. A first QPCH symbol is examined ( ) and the normalized pilot energy is determined ( ). If the normalized pilot energy is above a first threshold ( ), the symbol is demodulated and the QPCH-symbol-to-pilot-energy ratio is determined ( ) and compared against another threshold ( ). If the normalized pilot energy is below the first threshold, the system proceeds to the second QPCH symbol immediately. Depending on the resulting values, a second QPCH signal is examined ( ), the system sleeps ( ), or the system decides ( ) to process the primary paging channel directly ( ). If the second signal is demodulated, and if its normalized pilot energy is high enough, it also is demodulated and the ratio of the sum-of-the-combined-QPCH-symbols to the sum-of-the-combined-pilot-energies is determined ( ). If this ratio exceeds a threshold ( ), the primary paging channel is processed ( ); otherwise the system sleeps ( ).