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. 24, 2004
Filed:
Jun. 14, 2000
Toshiya Todoroki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
By using a branch metric and a path metric which are produced from received data every symbol time, an ACS circuit produces a path-selecting information while renewing the path metric by adding the branch metric entering the state to path metric of the connecting survivor for all the paths entering a state in accordance with Viterbi algorithm. The path-selecting information is sequentially stored in each of path memory blocks. The path memory blocks are connected to one another so that a result of the trace-back may become a starting point for starting the trace-back of a next path memory block when trace-back is made. The trace-back is started from a selected one of the path memory blocks having a state number obtained by a maximum path state number detector. An output of the selected path memory block is output via a selector as decoded data.