Telecommunications – Transmitter – Noise or interference elimination
Reexamination Certificate
2006-05-16
2006-05-16
Nguyen, Duc (Department: 2643)
Telecommunications
Transmitter
Noise or interference elimination
C455S114100, C455S114200, C375S295000, C375S296000, C375S297000
Reexamination Certificate
active
07046972
ABSTRACT:
A predistortion linearizer has signal dividing circuit dividing an input signal into two signals; signal adjusting circuit using one of the divided signals to execute predetermined adjustment and outputting a signal based on the adjustment; distortion signal generating circuit generating a distortion signal using the signal output from the signal adjusting circuit; signal synthesizing circuit synthesizing the other of the divided signals with the generated distortion signal; and signal amplifying circuit amplifying the synthesized signal and outputting an output signal, and wherein the signal adjusting circuit executes the predetermined adjustment such that there is a predetermined relationship between the level of a difference between the signal amplitudes of predetermined frequency components contained in a distortion signal and the level of a difference between the signal amplitudes of the predetermined frequency components contained in a distortion signal.
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European Search Report for EP 02 00 7937, dated Apr. 21, 2004.
Fujiwara Seiji
Ishida Kaoru
Matsuyoshi Toshimitsu
Matsushita Electric - Industrial Co., Ltd.
Nguyen Duc
Pham Tuan
RatnerPrestia
LandOfFree
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