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:
Aug. 26, 2003
Filed:
Mar. 04, 1999
Geoffrey F. Burns, Ridgefield, CT (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
An apparatus and method of a shared correlator system for a code division, multiple access (CDMA) receiver employs scheduling of correlation operations with identification tags (ID-tags). The scheduling allows for shared vector generation and correlation operations between processing units by pipeline processing. The shared correlator schedules correlation operations requested by processing units, generates matched-filter PN vectors associated with the identification tags for the correlation operations, and provides correlation results for the correlation operations. Scheduling may be implemented with a control processor, scheduler and memory. The control processor determines the matched-filter PN vector information for a requested operation using the current state of a reference PN code sequence, and this information is stored as the ID-tag. The control processor stores the ID-tag at an address in memory associated with a slot of a periodic symbol schedule. A counter of the scheduler steps through each memory address to provide an ID-tag for each slot. The ID-tag allows the matched-filter PN vector information for a requested correlation operation to be provided to the vector generator and vector correlator to generate the matched-filter PN vector for the slot.