Transmitter, signal generation device, calibration method, and signal generation method

Patent metadata

Field	Value
Publication number	US-9166707-B2
Application number	US-201314131652-A
Country	US
Kind code	B2
Filing date	Mar 28, 2013
Priority date	Mar 28, 2012
Publication date	Oct 20, 2015
Grant date	Oct 20, 2015

Abstract

It is intended to provide a transmitter capable of correcting signal distortion with high accuracy. Provided are a test signal generator; a frequency characteristics corrector for correcting an amplitude characteristic and a phase characteristic of a test signal; a modulator; an envelope detector; a frequency characteristics calculator for calculating frequency characteristics of an envelope signal; and a coefficients calculator for calculating, on the basis of the frequency characteristics, correction coefficients to be used for correcting the amplitude characteristic and the phase characteristic of the test signal. The test signal generator generates a test signal in which signal loci in each of at least two pairs of quadrants of first to fourth quadrants of the IQ plane are not symmetrical with each other.

First claim

The invention claimed is:

1. A transmitter comprising:
a test signal generator which, in operation, generates a test signal;
a frequency characteristics corrector which, in operation, corrects an amplitude characteristic and a phase characteristic of the test signal generated by the test signal generator;
a modulator which, in operation, modulates a corrected signal produced by the frequency characteristics corrector;
an envelope detector which, in operation, detects an enve…

Assignees

• Panasonic Corp

Inventors

• Matsuura Toru

Classifications

• H04L27/18

  Electricity · mapped topic

• H04B17/11 Primary

  Electricity · mapped topic

• H04B7/005

  Electricity · mapped topic

• H04L27/364

  Electricity · mapped topic

• H04B17/0015 Primary

  Electricity · mapped topic