초록 ▼

A device and a method for meeting the distortion characteristic of a predistorter in accordance with the distortion characteristic of an output amplifier in a transmitter. The device controls the non-linear distortion characteristic of a predistorter in a radio communication transmitter which includ

A device and a method for meeting the distortion characteristic of a predistorter in accordance with the distortion characteristic of an output amplifier in a transmitter. The device controls the non-linear distortion characteristic of a predistorter in a radio communication transmitter which includes the predistorter for beforehand generating the non-linear distortion characteristic in opposition to non-linear distortion characteristics arising in an output amplifier, and up-converter for converting an output frequency of the predistorter into a radio frequency bandpass and outputting the converted frequency to the output amplifier. The device includes: a monitoring unit for monitoring the output level of the output amplifier; a storing unit for beforehand storing the non-linear distortion characteristics of the predistorter as digital data; a distortion controller for outputting and controlling given non-linear distortion characteristic digital data stored in the storing unit in correspondence with the output level of the monitoring unit; and a digital/analog converter for converting the non-linear distortion characteristic digital data outputted by the distortion controller into an analog signal and providing the converted data to the predistorter.

대표청구항 ▼

[ What is claimed is:] [1.]1. A device for controlling a non-linear distortion characteristic of a predistorter in a radio communication transmitter wherein said predistorter is connected via an up-converter to an output amplifier and generates the non-linear distortion characteristic in opposition

[ What is claimed is:] [1.]1. A device for controlling a non-linear distortion characteristic of a predistorter in a radio communication transmitter wherein said predistorter is connected via an up-converter to an output amplifier and generates the non-linear distortion characteristic in opposition to non-linear distortion characteristics arising in said output amplifier, and said up-converter converting an output frequency of said predistorter into a radio frequency bandpass and outputting said converted frequency to said output amplifier, said device comprising:a monitoring unit connected to said output amplifier for monitoring an output level of said output amplifier and providing an output;a storing unit for storing the non-linear distortion characteristics of said predistorter as digital data;a distortion controller connected between said monitoring unit and said storing unit for outputting and controlling the digital data stored in said storing unit in correspondence with the output of said monitoring unit; anda digital/analog converter connected between said storing unit and said predistorter for converting the digital data outputted by said distortion controller into an analog signal and providing said analog signal to said predistorter;wherein said storing unit stores the digital data in a table including the output level of the output amplifier and at least one other quantity.