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:
Sep. 27, 2005
Filed:
Sep. 24, 2001
Yuri Goldstein, Southbury, CT (US);
Yuri Okunev, Southbury, CT (US);
Yuri Goldstein, Southbury, CT (US);
Yuri Okunev, Southbury, CT (US);
PCTel, Inc., Milpitas, CA (US);
Abstract
A modem includes an LDPC encoder which utilizes a deterministic H-matrix, optionally via a generation matrix, to generate redundant parity bits for a bit block. Ones are placed into the H-matrix in a completely diagonal manner with diagonals subdivided into sets of diagonals. The first diagonal in each set i begins with coordinates H(1,k), where k=(1+(i*M)). The remaining diagonals in the sets are offset from the first diagonals so that the column distances between any two pairs of diagonals is unique. In another embodiment, the H-matrix is determined by assigning '1s' in a first column, and then assigning '1s' of subsequent columns deterministically by causing each “1” in a previous ancestor column to generate a “1” in the next descendant column based on the rule that a descendant is placed one position below an ancestor except where rectangles would be generated. Interrupted descending diagonals are generated.