Telecommunications – Transmitter – With feedback of modulated output signal
Reexamination Certificate
2007-10-30
2007-10-30
Maung, Nay (Department: 2618)
Telecommunications
Transmitter
With feedback of modulated output signal
C455S063100, C455S114200, C455S114300, C375S295000, C375S296000, C375S297000, C375S285000, C330S149000
Reexamination Certificate
active
10518185
ABSTRACT:
A phase/amplitude control section controls the phase and amplitude of at least one of the signals: a distributed signal distributed by a modulation signal distributor and a reference signal based on an orthogonal base-band signal. A signal combiner combines a combinatory signal according to the distributed signal and the reference signal whose phase and amplitude have been controlled. A reference table updating section updates non-linear distortion compensating data according to the combinatory signal subjected to A/D conversion and the orthogonal base-band signal. With this configuration, since a known signal component is removed from the combinatory signal, the change amount of the signal input to the A/D converter of a feedback system circuit is reduced and the A/D converter of the feedback system circuit need not have a wide dynamic range performance.
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Matsuoka Akihiko
Murakami Yutaka
Takabayashi Shinichiro
Chen Junpeng
Matsushita Electric - Industrial Co., Ltd.
Maung Nay
RatnerPrestia
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