US Patent 7292648 Precoding for a non-linear codec

Patent 7292648 was granted and assigned to Agere Systems on November, 2007 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Agere Systems

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

72926480

Patent Inventor Names

Nuri R Dagdeviren0

Date of Patent

November 6, 2007

Patent Application Number

095404750

Date Filed

March 31, 2000

Patent Primary Examiner

‌

Young T. Tse

Patent abstract

A precoding system to achieve rates higher than 33.6 kbps in the analog modem to digital modem direction. The preceding system modifies the standard THP algorithm to adapt it for use in PCM modems. Instead of an arithmetic modulo operation that is implemented in the transmitter, the invention defines a Discrete Modulo Operation as a function of the constellation of levels chosen. This operation performs the function of limiting the amplitude of the transmitted signal.