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:
May. 14, 2002
Filed:
Jan. 14, 1999
Michiru Hori, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A Trellis decoder in which a demodulated signal is handled by dividing into four areas for eight symbols, namely a pre-circuit obtains a 3-bit sign according to a high-order 4-bit sign in the demodulated signal; an area determining circuit identifies any of the four areas by obtaining a 2-bit sign in the 3-bit output from the pre-circuit; a delay circuit delays the 2-bit output from the area determining circuit and a sign for the MSB in the demodulated signal; and a selection circuit identifies a value of a high-order two bits in a received symbol according to the 2-bit output of the area determining circuit, the MSB in the demodulated signal, and an estimated value of the LSB in the received symbol outputted by a convolutional coder.