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:
Jun. 22, 2010
Filed:
Jul. 01, 2005
Masahiko Sagisaka, Ota-ku, JP;
Yusaku Tada, Yokohama, JP;
Masahiko Sagisaka, Ota-ku, JP;
Yusaku Tada, Yokohama, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A modulator, and more particularly an HPSK modulator, is disclosed that enables the circuit scale to be reduced and also enables power consumption to be reduced. An HPSK modulatorincorporated in a radio communication apparatus or the like is equipped with a spreading code multiplication section, a complex arithmetic section, a coefficient determination section, and raised COS filtersand. Spreading code multiplication sectionmultiplies transmit data DPDCHby a spreading code Cd. Complex arithmetic sectionperforms complex arithmetic on an output signal output from spreading code multiplication sectionand a scrambling code Sn, and performs conversion to complex data. Coefficient determination sectiondetermines a filter coefficient Adbased on a gain factor βdthat determines transmission power. Raised COS filtersandband-limit the complex data using the filter coefficient.