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:
Jul. 29, 2003
Filed:
Apr. 14, 2000
Tatsuya Uchiki, Tokyo, JP;
Toshiharu Kojima, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A typical Viterbi decoder having a coherent detection function suffers from degraded performance under certain fading-induced phase shift conditions when used in a time diversity system. This problem is resolved by providing a demodulator for demodulating a data sequence multiplexed by multiplexing a plurality of data sequences of a same content with a time difference inserted therebetween for a time diversity system, which comprises: a phase correction unit for phase correcting the multiplexed data sequence; a diversity combiner for demultiplexing the multiplexed data sequence output from the phase correction unit into a plurality of data sequences, removing the time difference inserted between data sequences, and combining the data sequences; and a Viterbi decoding unit for Viterbi decoding the diversity combined signal from the diversity combiner.