Telecommunications – Transmitter – Noise or interference elimination
Reexamination Certificate
2006-03-28
2006-03-28
Nguyen, Lee (Department: 2682)
Telecommunications
Transmitter
Noise or interference elimination
C455S063100, C375S297000
Reexamination Certificate
active
07020447
ABSTRACT:
Distortion compensation coefficients for correcting distortion of a transmission power amplifier are stored in a memory beforehand, a distortion compensation coefficient conforming to powers or amplitudes of a present transmit signal and a past transmit signal is read out of the memory, and distortion compensation processing is applied to the transmit signal using this distortion compensation coefficient. The transmit signal thus subjected to distortion compensation processing is then amplified by the transmission power amplifier and the amplified signal is transmitted, and the distortion compensation coefficient is updated based upon the transmit signal before distortion compensation and an output signal from the transmission power amplifier.
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Kubo Tokuro
Maniwa Toru
Nagatani Kazuo
Ode Takayoshi
Oishi Yasuyuki
Fujitsu Limited
Katten Muchin & Rosenman LLP
Nguyen Lee
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