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:
Nov. 12, 2013
Filed:
Feb. 02, 2010
Stephen Allpress, Bristol, GB;
Quinn LI, Burlington, VT (US);
Stephen Allpress, Bristol, GB;
Quinn Li, Burlington, VT (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
An apparatus and method for implementing an equalizer which combines the benefits of a decision feedback equalizer (DFE) with a maximum-a-posterori (MAP) equalizer (or a maximum likelihood sequence estimator, MLSE) to provide an equalization device with significantly lower complexity than a full-state MAP device, but which still provides improved performance over a conventional DFE. The equalizer architecture includes two DFE-like structures, followed by a MAP equalizer. The first DFE forms tentative symbol decisions. The second DFE is used thereafter to truncate the channel response to a desired memory of Lsymbols, which is less than the total delay spread of L symbols of the channel. The MAP equalizer operates over a channel with memory of Lsymbols (where L<=L), and therefore the overall complexity of the equalizer is significantly reduced.