Paper Abstract and Keywords |
Presentation |
2022-07-15 15:20
Packet-level Index Modulation under Duty Cycle constraints Ryogo Oya, Shinichiro Kakuda, Takeo Fujii (UEC), Osamu Takyu (Shinshu Univ.), Mai Ohta (Fukuoka Univ.), Koichi Adachi (UEC) SR2022-44 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Low power wide area (LPWA) is an important technology in the field of the Internet of Things (IoT) because of its low cost and long-distance transmission capability. In LPWA, including LoRa, which is one of its standards, the transmission time per channel is limited by the duty cycle (DC) at each terminal. Therefore, packet-level index modulation (PLIM) has been proposed to increase the number of bits that can be transmitted by mapping information bits on the time and frequency axes in LoRa transmission. However, when the transmitted bit sequence is biased, the system may concentrate on a particular frequency channels, making the transmission impossible on the channel due to the DC requirements. To avoid the intensive use of certain channels in PLIM, we propose a method of adaptively exchanging indexes on the frequency axis. The index exchange decision is made at regular intervals, in which each LoRa terminal predicts the transmitted duration ratio for each channel based on the transmission channel history up to the time of exchange judgement. Then, when the difference between the maximum and minimum predicted time duration exceeds the threshold value, each LoRa terminal exchanges indexes among the two channels. The simulation results show that the proposed method can avoid the intensive use of specific channels and reduce the transmission limitations due to DC constraints. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
LPWA / LoRa / Index Modulation / Duty Cycle / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 122, no. 107, SR2022-44, pp. 110-115, July 2022. |
Paper # |
SR2022-44 |
Date of Issue |
2022-07-06 (SR) |
ISSN |
Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
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SR2022-44 |
Conference Information |
Committee |
NS SR RCS SeMI RCC |
Conference Date |
2022-07-13 - 2022-07-15 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
The Kanazawa Theatre + Online |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Distributed Wireless Network, M2M (Machine-to-Machine),D2D (Device-to-Device),IoT(Internet of Things), etc |
Paper Information |
Registration To |
SR |
Conference Code |
2022-07-NS-SR-RCS-SeMI-RCC |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Packet-level Index Modulation under Duty Cycle constraints |
Sub Title (in English) |
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Keyword(1) |
LPWA |
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LoRa |
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Index Modulation |
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Duty Cycle |
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1st Author's Name |
Ryogo Oya |
1st Author's Affiliation |
The University of Electro-Communications (UEC) |
2nd Author's Name |
Shinichiro Kakuda |
2nd Author's Affiliation |
The University of Electro-Communications (UEC) |
3rd Author's Name |
Takeo Fujii |
3rd Author's Affiliation |
The University of Electro-Communications (UEC) |
4th Author's Name |
Osamu Takyu |
4th Author's Affiliation |
Shinshu University (Shinshu Univ.) |
5th Author's Name |
Mai Ohta |
5th Author's Affiliation |
Fukuoka Univ. (Fukuoka Univ.) |
6th Author's Name |
Koichi Adachi |
6th Author's Affiliation |
The University of Electro-Communications (UEC) |
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Speaker |
Author-1 |
Date Time |
2022-07-15 15:20:00 |
Presentation Time |
25 minutes |
Registration for |
SR |
Paper # |
SR2022-44 |
Volume (vol) |
vol.122 |
Number (no) |
no.107 |
Page |
pp.110-115 |
#Pages |
6 |
Date of Issue |
2022-07-06 (SR) |
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