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:
Jun. 21, 2011
Filed:
May. 11, 2007
Logeshwaran Vijayan, Chennai, IN;
Partha Sarathy Murali, Hyderabad, IN;
Sundaram Vanka, Notredame, IN (US);
Logeshwaran Vijayan, Chennai, IN;
Partha Sarathy Murali, Hyderabad, IN;
Sundaram Vanka, Notredame, IN (US);
Redpine Signals, Inc., San Jose, CA (US);
Abstract
A reduced complexity maximum likelihood decoder receives a stream of symbols Y and channel estimate H. A transformation converts Y and H into Z and R by computing matrix R, such that the product of R and Q produces matrix H. A second transformation column-swaps matrix H to form H', thereafter generating Q′ and R′ subject to the same constraints as was described for Q and R. Transformed variables Z and Z′ are formed by multiplying Y by Qand Q′, respectively. Table entries with Z and R and Z′ and R′ have entries of all possible xaccompanied by estimates of xderived from xand Z, and similar entries of all possible xaccompanied by estimates of xderived from xand Z′. Hard and soft decisions are made by finding the minimum distance metric of the combined entries of the first and second table.