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. 02, 2002
Filed:
Sep. 10, 1999
Sverrir Olafsson, Reykjavik, IS;
Olafur Jonsson, Reykjavik, IS;
Conexant Systems, Inc., Newport Beach, CA (US);
Abstract
A modem system utilizes PCM encoding and transmission techniques in the upstream direction from a client modem (connected to a digital network via an analog loop) to a central site modem (connected to the digital network via a digital link). The modem system employs precoding techniques that enable the transmit signal to be pre-equalized to compensate for the analog channel characteristics. The precoding technique generates a plurality of equivalent signal point sequences in response to a digital data input. The signal point sequences are analyzed and compared relative to a predetermined cost metric such as transmit power. A preferred signal point sequence is selected and transmitted to the central site modem.