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. 13, 2001
Filed:
Aug. 07, 1998
Dietmar Lipka, Berg, DE;
Telefonaktiebolaget LM Ericsson, Stockholm, SE;
Abstract
Digital filtering is performed by receiving an L-bit block of 1-bit data samples, wherein L is greater than 1, and using the L-bit block of 1-bit data samples to select a corresponding one of,filter output values. Selection may be accomplished by using each of the L 1-bit data samples to determine a product value by alternatively selecting a corresponding filter coefficient or a negation of the filter coefficient, and then generating the corresponding one of the,filter output values by adding together the L product values. Alternatively, part or all of the L-bit block of 1-bit data samples may be used to address one or more memory structures having stored therein corresponding filter output values. When more than one memory structure is used, the outputs from the memories are added together to generate the filter result. In another aspect, a shift register and latch arrangement decimate the serially received 1-bit data samples, thereby allowing the filter result to be generated at the decimated rate.