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Expired Canadian patentCanada

Code design and implementation improvements for low density parity check codes for wireless routers using 802.11n protocol

CA 2619638 C · Owner: Lee, Lin-Nan · Inventors: Eroz, Mustafa; Lee, Lin-Nan; Sun, Feng-Wen

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Abstract From the Canadian patent

Method and apparatus for implementing LDPC codes in an IEEE 802.11 standard system configured to operate in a Multiple-Input Multiple-Output (MIMO) , schema. A method in accordance with the present invention comprises defining a base LDPC code having a length , equal to an integer number of data carriers in an ODFM symbol transmitting , the base LDPC , code over a plurality of sub-carriers wherein the base code is transmitted at an expected phase , on sub-carriers specified by the IEEE 802.11 standard system and transmitting , the base LDPC , code on other sub-carriers than those specified by the IEEE 802.11 standard system, wherein , the base LDPC code on the other sub-carriers is …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Filed September 8, 2006 and granted December 18, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 8, 2026.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 8, 2006
GrantedDecember 18, 2012
Term endedSeptember 8, 2026
Patent numberCA 2619638 C
Classification (IPC)H04L27/26 +2 more

Timeline

Timeline From CIPO dates

2007200920112013201520172019202120232025Application filedSep 8, 2006Patent grantedDec 18, 2012Term endedSep 8, 2026

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.