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:
Jul. 14, 1998
Filed:
Aug. 29, 1996
Jan C Ault, Santee, CA (US);
Robbin D Hughes, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
A system and method for acquiring a code division multiple access (CDMA) pilot signal having a pilot pseudonoise (PN) code offset in a CDMA communication system. A received signal is correlated with a first set of PN code offset hypotheses. If this first 'full' search is unsuccessful in acquiring the CDMA pilot signal, the method includes waiting for a first period, and then correlating the received signal with a second set of PN code offset hypotheses which are a subset of said first set of PN code offset hypotheses and therefore requires less search time. If this 'mini' search is unsuccessful in acquiring the CDMA pilot signal the method includes waiting for a second period and then quickly measuring the energy of the received signal. If the received energy exceeds a threshold, then a 'mini' search is immediately performed. These alternating search techniques of full, mini, micro are repeated.