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. 03, 2014
Filed:
Nov. 15, 2010
Takashi Maehata, Osaka, JP;
Mikhail Illarionov, Osaka, JP;
Takashi Maehata, Osaka, JP;
Mikhail Illarionov, Osaka, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A peak power suppressing circuit can suppress a peak power of an IQ (In-phase and Quadrature-phase) baseband signal more assuredly. In particular, the peak power suppressing circuit performs a clipping process on an IQ baseband signal. The suppressing circuit includes a power calculation section that calculates an instantaneous power P of an IQ baseband signal, a pulse retention section that retains a cancellation pulse S that has a frequency component in a frequency band B of the IQ baseband signal and a frequency component outside the frequency band, and a clipping processing section that subtracts, from an IQ baseband signal whose instantaneous power P that has been calculated is greater than a predetermined threshold Pth, cancellation signals Ic and Qc obtained by multiplying increments ΔI and ΔQ of the IQ baseband signal from the threshold Pth by the cancellation pulse S.