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:
Jan. 20, 1998
Filed:
Apr. 24, 1995
Toshiharu Yagi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Convolutional code symbols are sequentially stored into a first buffer at a transmission rate and read therefrom into a decoder where the symbols are decoded at a rate higher than the transmission rate and stored into a second buffer. A controller determines the likelihood of each decoded symbol in accordance with a predetermined likelihood algorithm and causes the decoded symbols to be read out of the second buffer in a backward direction into the decoder when the determination indicates a low likelihood value. When the first buffer is overflowed, the controller causes symbols to be read out of the first buffer into the decoder staring with a symbol which is k symbols older than the most recently received symbol and causes the decoder to shift its symbol timing by one clock interval, where k is an integer ranging from zero to a predetermined number which is smaller than the maximum number of symbols that can be stored in the first buffer.