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:
Feb. 13, 2007
Filed:
May. 31, 2005
John Plasterer, Burnaby, CA;
Jurgen Hissen, Port Moody, CA;
Mathew Mcadam, Vancouver, CA;
Anthony Eugene Zortea, Pipersville, PA (US);
Ognjen Katic, Vancouver, CA;
John Plasterer, Burnaby, CA;
Jurgen Hissen, Port Moody, CA;
Mathew McAdam, Vancouver, CA;
Anthony Eugene Zortea, Pipersville, PA (US);
Ognjen Katic, Vancouver, CA;
PMC-Sierra, Inc., Santa Clara, CA (US);
Abstract
Methods and apparatus for canceling pre-cursor inter-symbol interference (ISI) are disclosed. In a digital communication system, a significant amount of noise can be attributed to the pre-cursor portion of the ISI. In a receiver, it can be relatively difficult to compensate for pre-cursor ISI in part because pre-cursor ISI is a result of one or more symbols that have yet to arrive at the receiver. One embodiment removes a portion of this ISI by using multiple detection thresholds in parallel. For example, data slicing (generation of a hard decision) can include three thresholds. These thresholds for slicing include a positive offset, a negative offset and no offset. The positive and negative offsets can correspond to the expected pre-cursor component of the data channel for which the data is transmitted or to a fraction thereof. The path with the correctly-compensated ISI is selected later.