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. 05, 1994
Filed:
Feb. 07, 1992
Yasuo Takahashi, Tokyo, JP;
Tatsuya Ishikawa, Tokyo, JP;
Toshio Aoki, Tokyo, JP;
Nobuyuki Miki, Tokyo, JP;
Masatoshi Hamada, Tokyo, JP;
Masatoshi Hamada, Tokyo, JP;
Yasuhiro Hashimoto, Tokyo, JP;
Kenji Ueoka, Tokyo, JP;
Nobuhiko Kawai, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Nippon Hoso Kyokai, Tokyo, JP;
Abstract
In this invention, in order to generate a VSB modulation signal from a digital baseband signal, an in-phase component of a modulation signal having a frequency spectrum having a high-frequency component whose level is half that of its low-frequency component, and an orthogonal component of the modulation signal of a high-frequency component having a frequency spectrum whose level is half that of the low-frequency component are generated from the baseband signal. The in-phase component and the orthogonal component are multiplied with carrier signals to obtain a carrier in-phase component and a carrier orthogonal component. The carrier in-phase component and the carrier orthogonal component are synthesized to obtain a VSB modulation signal.