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:
Mar. 23, 2010
Filed:
Apr. 03, 2003
Christopher Anthony Aldrige, Singapore, SG;
Ser Wah OH, Singapore, SG;
Christopher Anthony Aldrige, Singapore, SG;
Ser Wah Oh, Singapore, SG;
STMicroelectronics Asia Pacific Pte. Ltd., Singapore, SG;
Abstract
An efficient architecture for a rake combiner is disclosed, for constructively combining the desired multi-path signals from a Code-Division Multiple-Access (CDMA) based system, such as a Third-Generation Partnership Project (3GPP) Frequency Division Duplex (FDD) mode Wideband CDMA (W-CDMA) system, or an IS-95 CDMA system. The described rake combiner employs a single M-stage tap-delay line, an N+1 input adder, an arrangement of index offsets, pass gates, comparators and an M-stage counter to perform the combination, where M represents the delay spread in terms of symbol duration and N represents the number of rake fingers to be combined. The rake combiner architecture facilitates lowered resource requirements through use of a single tap-delay line in contrast to a conventional rake combiner which uses a series of M-stage tap-delay lines and an N input adder to perform the combination.