Presentation 2022-11-07
[Invited Talk] Implementation of Packet Level-Index Modulation
Mai Ohta, Takeo Fujii, Koich Adachi, Osamu Takyu,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Packet-Level Index Modulation (PLIM) for Low Power Wide Area (LPWA) as a method to increase the number of transmitted bits under various constraints has been proposed. In LPWA, a communication time ratio called duty cycle and low power consumption for battery operation are mandatory conditions. LoRaWAN (Long Range WAN) is one of the standards used for LPWA. In LoRa, information is transmitted by LoRa modulation using chirp modulation, and it is difficult to increase the number of transmission bits because the duty cycle must be satisfied. Therefore, PLIM has been proposed to increase the number of transmitted information bits by adding information to the frequency and time indices of packets while performing packet communication. When information is added to the index of a packet, the amount of information by the indexes is limited by the number of frequency index and time index. In addition, since LoRaWAN is used in systems that transmit packets at regular intervals, such as IoT, there is a possibility of continuous collisions between nodes due to periodic transmission if packets are transmitted continuously with the same index. Furthermore, PLIM requires time synchronization between transmitter and receiver, especially when time indexes are detected. This presentation introduces the periodic packet collision avoidance scheme and synchronization-free differential PLIM that we have studied, and reports on our current research for the implementation of PLIM, which is being conducted as a research project commissioned by the Ministry of Internal Affairs and Communications.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Low Power Wide Area / Packet-Level Index Modulation / Differential Packet-Level Index Modulation
Paper # SR2022-50
Date of Issue 2022-10-31 (SR)

Conference Information
Committee SR
Conference Date 2022/11/7(2days)
Place (in Japanese) (See Japanese page)
Place (in English) Fukuoka University
Topics (in Japanese) (See Japanese page)
Topics (in English) Software Defined Radio, Cognitive Radio, Spectrum Sharing, etc.
Chair Suguru Kameda(Hiroshima Univ.)
Vice Chair Osamu Takyu(Shinshu Univ.) / Kentaro Ishidu(NICT) / Kazuto Yano(ATR)
Secretary Osamu Takyu(Mie Univ.) / Kentaro Ishidu(Tokai Univ.) / Kazuto Yano(NTT)
Assistant Taichi Ohtsuji(NEC) / WANG Xiaoyan(Ibaraki Univ.) / Akemi Tanaka(MathWorks) / Katsuya Suto(Univ. of Electro-Comm)

Paper Information
Registration To Technical Committee on Smart Radio
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) [Invited Talk] Implementation of Packet Level-Index Modulation
Sub Title (in English)
Keyword(1) Low Power Wide Area
Keyword(2) Packet-Level Index Modulation
Keyword(3) Differential Packet-Level Index Modulation
1st Author's Name Mai Ohta
1st Author's Affiliation Fukuoka University(Fukuoka Univ.)
2nd Author's Name Takeo Fujii
2nd Author's Affiliation The University of Electro-Communications(UEC)
3rd Author's Name Koich Adachi
3rd Author's Affiliation The University of Electro-Communications(UEC)
4th Author's Name Osamu Takyu
4th Author's Affiliation Shinsyu University(Shinsyu Univ.)
Date 2022-11-07
Paper # SR2022-50
Volume (vol) vol.122
Number (no) SR-243
Page pp.pp.29-29(SR),
#Pages 1
Date of Issue 2022-10-31 (SR)