Transmitting method and transmitting apparatus

Details Transmitting method and transmitting apparatus Transmitting method and transmitting apparatus

2006-04-04

2006-04-04

Tu, Christine T. (Department: 2138)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S700000, C329S318000

Reexamination Certificate

active

07024608

ABSTRACT:
Ideal nonlinear distortion compensation is realized by removing an imperfection of amplitude delay characteristic and an affection of inherent deviation that an amplifier has. A linear distortion compensation factor calculating part (18) estimates, based on quadrature demodulated signals (I′ch, Q′ch), the linear distortion characteristic occurring mainly due to imperfection of analog circuits, such as a quadrature modulator (13) and a high-power amplifier (14), and calculates and outputs a linear distortion compensation factor for compensating the linear distortion. A linear distortion compensating part (12) performs a pre-distortion (addition of a reverse characteristic of the linear distortion characteristic) by multiplying the baseband signals (Ich, Qch) by the data of the linear distortion compensation factor.

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