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:
Apr. 10, 2012
Filed:
Jul. 18, 2008
Shigenori Hayase, Kodaira, JP;
Takashi Yano, Tokorozawa, JP;
Masaaki Shida, Hachioji, JP;
Keisuke Yamamoto, Kokubunji, JP;
Yunjian Jia, Kodaira, JP;
Shigenori Hayase, Kodaira, JP;
Takashi Yano, Tokorozawa, JP;
Masaaki Shida, Hachioji, JP;
Keisuke Yamamoto, Kokubunji, JP;
Yunjian Jia, Kodaira, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A method for suppressing the peak-to-average power ratio (PAPR) while limiting deterioration in signal characteristics in wireless communication devices utilizing wireless communication methods (OFDM method, MIMO method) for multiplexing and sending multiple signals. A weight calculator unit sets a large weight for transmit signals whose channel quality is poor, relative to the weight of each base component based on the acquired channel quality. A peak detector unit detects the peak from the signal string after unitary conversion, and extracts a distortion component to apply for suppressing the peak. A peak suppression signal generation unit calculates the peak signal from the distortion component and weight of each base component, to add to each base component, and adds the peak suppression signal to each base component prior to unitary transformation.