WIRELESS COMMUNICATION METHOD, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS TRANSMISSION DEVICE

Title:

WIRELESS COMMUNICATION METHOD, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS TRANSMISSION DEVICE

Document Type and Number:

WIPO Patent Application WO/2023/148984

Kind Code:

A1

Abstract:

A wireless transmission device 10 and a wireless reception device that are adapted for QAM and APSK are used. The wireless transmission device 10 is provided with a power amplifier 26 with variable transmission power. An SNR degradation amount calculation unit 22 calculates an SNR degradation amount \{QAM\} caused in QAM and an SNR degradation amount \{APSK\} caused in APSK, on the basis of the input/output characteristics of the power amplifier 26 acquired from an input/output characteristics storage unit 30, a QAM modulation signal acquired from a QAM modulation unit 16, an APSK modulation signal acquired from an APSK modulation unit 18, and the transmission power of the power amplifier 26. A modulation scheme selection unit 20 acquires a required SNR\{QAM\} for QAM and a required SNR\{APSK\} for APSK from a required SNR storage unit 24, compares "required SNR\{QAM\} + SNR degradation amount \{QAM\}" with "required SNR\{APSK\} + SNR degradation amount \{APSK\}", and selects one of the modulation schemes with the smaller of the values.

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Inventors:

KURIYAMA KEITA (JP)
FUKUZONO HAYATO (JP)
MIYAGI TOSHIFUMI (JP)
ONIZAWA TAKESHI (JP)

Application Number:

PCT/JP2022/004753

Publication Date:

August 10, 2023

Filing Date:

February 07, 2022

Export Citation:

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Assignee:

NIPPON TELEGRAPH & TELEPHONE (JP)

International Classes:

H04L27/36

Domestic Patent References:

WO2006076697A2

2006-07-20

Foreign References:

CN101867437A	2010-10-20
JP2015177435A	2015-10-05

Other References:

RAMDANE CHOUITEM: "EVM based AMC for an OFDM system", WIRELESS TELECOMMUNICATIONS SYMPOSIUM (WTS), 2010, IEEE, 21 April 2010 (2010-04-21), Piscataway, NJ, USA , pages 1 - 5, XP031686233, ISBN: 978-1-4244-6558-3

Attorney, Agent or Firm:

TAKADA, TAKAHASHI & PARTNERS (JP)

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