Transmission apparatus and transmission power control method

Details Transmission apparatus and transmission power control method Transmission apparatus and transmission power control method

2008-01-11

2011-12-06

Payne, David C. (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S259000, C375S260000, C375S261000, C348S723000

Reexamination Certificate

active

08073075

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 (100) is provided with LPF (108) that performs waveform shaping of output power of PA (103) and ADC (109) 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.

REFERENCES:
patent: 2002/0154708 (2002-10-01), Rouphael
patent: 2005/0134377 (2005-06-01), Dent
patent: 2006/0140145 (2006-06-01), Ogawa
patent: 2008/0146174 (2008-06-01), Flowers
patent: 11-284510 (1999-10-01), None
patent: 2001-136081 (2001-05-01), None
patent: 2005-295523 (2005-10-01), None
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International Search Report dated Apr. 15, 2008.

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