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:
Dec. 06, 2011
Filed:
Jan. 11, 2008
Akihiko Matsuoka, Kanagawa, JP;
Tomoya Urushihara, Chiba, JP;
Wayne Lee, San Mateo, CA (US);
Gary DO, San Jose, CA (US);
Akihiko Matsuoka, Kanagawa, JP;
Tomoya Urushihara, Chiba, JP;
Wayne Lee, San Mateo, CA (US);
Gary Do, San Jose, CA (US);
Panasonic Corporation, Osaka, JP;
Abstract
The transmission apparatus and transmission power controlling method are able to keep high speed feedback control and control transmission power accurately. Polar modulation transmitter () is provided with LPF () that performs waveform shaping of output power of PA () and ADC () that obtains output power data for each mode by sampling filtered signals in compressed mode and filtered signals in uncompressed mode at the same phase as the filtered signals in compressed mode. In this way, the phases of sampling signals before and after the mode change are the same, so that it is possible to obtain sampling signals of the same condition before and after the mode change, from filtered signal waveforms. According to feedback control based on these sampling signals, even if drift components remain in the filtered signals, the influence can be ignored, so that it is possible to keep high speed feedback control, and estimate and control transmission power accurately.