Title:
シングルキャリア方式の送信装置
Document Type and Number:
Japanese Patent JP6924606
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve a deterioration in transmission performance caused by signal distortion of a modulation wave in a power amplifier, and to suppress an increase in a circuit scale.SOLUTION: A distortion information determination part 21 of a transmission device 1 inputs distortion information for an output signal of a power amplification part 19, and determines whether or not a value indicated by the distortion information is an optimal value, and generates optimality determination information. A mapping control part 22 repeats change processing of the phase and amplitude of mapping information stored in a mapping table 23 until the value indicated by the distortion information becomes the optimal value on the basis of the optimality determination information for each group of a signal point group arranged on a circumference having the same amplitude in constellation of ideal signal points of the mapping information. Thus, the mapping information in which a degree of deviation between the ideal signal points and reception signal points becomes the minimum is stored in the mapping table 23.SELECTED DRAWING: Figure 1
Inventors:
Matsu saki honbun
Hirokazu Kamoda
Hirokazu Kamoda
Application Number:
JP2017084351A
Publication Date:
August 25, 2021
Filing Date:
April 21, 2017
Export Citation:
Assignee:
Japan Broadcasting Corporation
International Classes:
H04L27/26; H04B1/04
Domestic Patent References:
| JP2007096382A | ||||
| JP2005175793A | ||||
| JP2017059889A | ||||
| JP2010136254A |
Foreign References:
| US20090054016 |
Attorney, Agent or Firm:
Yasunobu Hanamura