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. 01, 2011
Filed:
Sep. 15, 2007
Method and apparatus for differentiated communication channel robustness in a multi-tone transceiver
Avadhani Shridhar, Santa Clara, CA (US);
Sam Heidari, Menlo Park, CA (US);
Rouben Toumani, San Jose, CA (US);
Ying Wu, Cupertino, CA (US);
Avadhani Shridhar, Santa Clara, CA (US);
Sam Heidari, Menlo Park, CA (US);
Rouben Toumani, San Jose, CA (US);
Ying Wu, Cupertino, CA (US);
Ikanos Communications, Inc., Fremont, CA (US);
Abstract
A multi-tone transceiver including: a channel controller and a plurality of components forming a transmit path and a receive path. The channel controller configured to determine bit-loading for each successive symbol or tone set based on a 1noise margin target for a first subset of tones in each tone set dedicated to transport of a robust communications channel (RCC) and based on a 2noise margin target less than the 1noise margin target for remaining tones in each tone set dedicated to a standard communications channel (SCC). The plurality of components forming the transmit and receive paths are responsive to the channel controller to select for data modulated on a given tone at least one of smaller constellations and higher gain scaling levels when the given tone corresponds to an RCC tone as compared to an SCC tone, whereby the first set of tones dedicated to the RCC exhibit greater immunity to noise variations than the remaining tones dedicated to the SCC.