Terminal Identification During Collisions in PhyC-SN Using RF Fingerprinting Based on Time-Domain Phase Dispersion (Short Paper)
Toshi Ito, Osamu Takyu, Mai Ohta, Takeo Fujii and Koichi Adachi
IEICE Technical Report, 21 Jul. 2026, The Institute of Electronics, Information and Communication Engineers
Proposal for PLIM mapping design using aggregated data (Short Paper)
Atsuhiro Tokita, Osamu Takyu, Koichi Adachi, Mai Ohta and Takeo Fujii
IEICE Technical Report, 21 Jul. 2026, The Institute of Electronics, Information and Communication Engineers
Sensor Count Identification Using Phase Transition Variance in Physical Wireless Parameter Conversion Sensor Networks Under Wireless Channel Conditions (Short Paper)
Toshi Ito, Osamu Takyu, Mai Ohta, Takeo Fujii and Koichi Adachi
IEICE Technical Report, 11 May 2026, The Institute of Electronics, Information and Communication Engineers
B-17-10 無線物理量変換一括収集法における周波数オフセット起因の位相時間分散を用いたセンサ数推定
11 Mar. 2026
B-17-6 過去の集約データを用いたPLIMマッピング設計の有効性評価
11 Mar. 2026
Experimental verification of access control for frequency spectrum sharing between Wi-Fi Halow and LoRa (Short Paper)
Keita Aoki, Osamu Takyu, Koichi Adachi, Mai Ohta and Takeo Fujii
IEICE Technical Report, 04 Mar. 2026, The Institute of Electronics, Information and Communication Engineers
Temperature-Dependent Clock Drift Estimation Method for Reducing Index Detection Errors in Packet-Level Index Modulation
Hitoshi Yamaski, Mai Ohta and Makoto Taromaru
IEICE Technical Report, 26 Jan. 2026, The Institute of Electronics, Information and Communication Engineers
Highly Efficient Wireless Networks Enabled by a Distributed Spectrum Management Database
Takeo Fujii, Mai Ohta, Osmau Takyu, Yuzo Taenaka, Daiki Nobayashi, Kazuya Tsukamoto and Takeshi Ikenaga
IEICE Technical Report, 26 Jan. 2026, The Institute of Electronics, Information and Communication Engineers
Adaptive Spectrum Sensing Using Multi Criteria Decision Analysis (Poster Presentation)
Makihito Ide and Mai Ohta
IEICE Technical Report, 19 Nov. 2025, The Institute of Electronics, Information and Communication Engineers
A Study on Interference Detection Method under Local 5G (Poster Presentation)
Yasunori Takahashi and Mai Ohta
IEICE Technical Report, 19 Nov. 2025, The Institute of Electronics, Information and Communication Engineers
A Study on Learning-Based Channel Selection Method for IoT Terminals with Low Communication Frequency (Poster Presentation)
Kaede Morishita, Mai Ohta and Makoto Taromaru
IEICE Technical Report, 19 Nov. 2025, The Institute of Electronics, Information and Communication Engineers
A Study on Data Loss Avoidance Method Using PLIM for Fragmented Data Transmission in LPWAN (Poster Presentation)
Daiki Nitta and Mai Ohta
IEICE Technical Report, 19 Nov. 2025, The Institute of Electronics, Information and Communication Engineers
A Study on Channel Selection Methods for Improving Fairness in CSMA/CA Communication under Congested Conditions (Poster Presentation)
Yuto Isaji and Ota Mai
IEICE Technical Report, 19 Nov. 2025, The Institute of Electronics, Information and Communication Engineers
Identification of Concurrent Sensor Count in PhyC-SN Using Spectral Fluctuation Learning with Transformer (Poster Presentation)
Toshi Ito, Osamu Takyu, Mai Ohta, Takeo Fujii and Koichi Adachi
IEICE Technical Report, 19 Nov. 2025, The Institute of Electronics, Information and Communication Engineers
A Temperature-Dependent Clock Drift Estimation Method for Packet-Level Index Modulation Using a Low-Accuracy Oscillator (Poster Presentation)
Hitoshi Yamasaki, Hiroki Matsuura, Mai Ohta and Makoto Taromaru
IEICE Technical Report, 19 Nov. 2025, The Institute of Electronics, Information and Communication Engineers
Packet-Level Index Modulation Using LoRaWAN Class A (Invited Talk)
Mai Ohta
IEICE Technical Report, 24 Jun. 2025, The Institute of Electronics, Information and Communication Engineers
A Study on Utilization of In-Channel Frequency Offset Index for Packet-Level Index Modulation Using LoRaWAN (Poster Presentation)
Mai Ohta and Hiroki Matsuura
IEICE Technical Report, 04 Jun. 2025, The Institute of Electronics, Information and Communication Engineers
Performance Evaluation of Resource Allocation Methods Utilizing Hidden Node Relationship Information in LPWA (Poster Presentation)
Keita Aoki, Osamu Takyu, Koichi Adachi, Mai Ohta and Takeo Fujii
IEICE Technical Report, 04 Jun. 2025, The Institute of Electronics, Information and Communication Engineers
B-17-8 920MHz帯IEEE802.11ahとLPWAとの時空間周波数共用
28 Mar. 2025
B-17-7 LPWAにおける隠れ端末関係情報を活用したリソース割り当て法
28 Mar. 2025
Investigation of a Method for Identifying Sensor Information Using a Constrained Database Update Algorithm in Physical Wireless Parameter Conversion Sensor Networks (Short Paper)
Toshi Ito, Osamu Takyu, Mai Ohta, Takeo Fujii and Koichi Adachi
IEICE Technical Report, 30 Jan. 2025, The Institute of Electronics, Information and Communication Engineers
A Study on Utilization of Frequency Offsets for Packet-Level Index Modulation Using LoRa Signals
Mai Ohta, Hiroki Matsuura and Takeo Fujii
IEICE Technical Report, 30 Jan. 2025, The Institute of Electronics, Information and Communication Engineers
A Study to Improve the Learning Accuracy of a Proposed Channel Selection Method Based on Machine Learning (Poster Presentation)
Kaede Morishita, Mai Ohta and Makoto Taromaru
IEICE Technical Report, 12 Nov. 2024, The Institute of Electronics, Information and Communication Engineers
A Study on Channel Selection Method by Multi-Armed Bandit Algorithm Using Channel Usage Results of Other Terminals (Poster Presentation)
Kaede Morishita, Mai Ohta and Makoto Taromaru
IEICE Technical Report, 04 Nov. 2024, The Institute of Electronics, Information and Communication Engineers
A Study on Temperature-Aware Clock Drift Estimation Method for Packet-Level Index Modulation (Poster Presentation)
Hitoshi Yamasaki, Hiroki Matsuura, Mai Ohta and Makoto Taromaru
IEICE Technical Report, 04 Nov. 2024, The Institute of Electronics, Information and Communication Engineers
Impact of Clock Drift in Real Environment for Packet-Level Index Modulation
Hitoshi Yamasaki, Mai Ohta, Hiroki Matuura and Makoto Taromaru
IEICE Technical Report, 17 Jul. 2024, The Institute of Electronics, Information and Communication Engineers
A Study of Environment Recognition Algorithm Using Mobile Aggregation Stations with Physical Wireless Parameter Conversion Sensor Networks
Toshi Ito, Osamu Takyu, Mai Ohta, Takeo Fujii and Koichi Adachi
IEICE Technical Report, 17 Jul. 2024, The Institute of Electronics, Information and Communication Engineers
Impact of Inexpensive Oscillator in Wireless Sensor Node on Packet-Level Index Modulation Method Under Real Environment
Hitoshi Yamasaki; Hiroki Matsuura; Mai Ohta; Makoto Taromaru
2024 Fifteenth International Conference on Ubiquitous and Future Networks (ICUFN), Jul. 2024, IEEE
Evaluation of Packet-Level Index Modulation in Actual Equipment (Invited Lecture)
Mai Ohta, Takeo Fujii, Koichi Adachi and Osamu Takyu
IEICE Technical Report, 30 May 2024, The Institute of Electronics, Information and Communication Engineers
B-5A-105 干渉低減可能な帯域幅可変LoRaの検討
08 Mar. 2024
B-5B-19 動的ネットワークトポロジー環境におけるリソース割当法の評価
06 Mar. 2024
B-17-12 パケット型インデックス変調における他システム干渉を考慮した最適マッピング設計
05 Mar. 2024
Received Signal Aided Implicit Node Clustering in LPWAN
Takahiro Saraya, Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Takeo Fujii and Mai Ohta
IEICE Technical Report, 14 Dec. 2023, The Institute of Electronics, Information and Communication Engineers
An Implementation of Differential Packet-Level Index Modulation (Technology Exhibit)
Mai Ohta, Hiroki Matsuura, Hitoshi Yamasaki and Makoto Taromaru
IEICE Technical Report, 09 Nov. 2023, The Institute of Electronics, Information and Communication Engineers
Identification of the Number of Signal Collision Sensors Using Spectral Fluctuation Caused by Frequency Offset in Physical Wireless Parameter Conversion Sensor Networks (Poster Presentation)
Toshi, Osamu Takyu, mai ohta, Takeo Fujii and Koichi Adachi
IEICE Technical Report, 30 Oct. 2023, The Institute of Electronics, Information and Communication Engineers
A Study on Channel Access Using Multi-Armed Bandit Algorithm (Poster Presentation)
Mai Ohta, Takashi Imanaka and Makoto Taromaru
IEICE Technical Report, 30 Oct. 2023, The Institute of Electronics, Information and Communication Engineers
Resource Allocation Strategy to Tackle the Hidden Node Problem in LPWAN
Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta and Takeo Fujii
IEICE Technical Report, 19 Oct. 2023, The Institute of Electronics, Information and Communication Engineers
B-17-6 パケット型インデックス変調におけるエリア推定を活用した環境認識型集約の一検討
12 Sep. 2023
B-5-76 複数送信周期環境における自律分散型リソース割当法の検討
12 Sep. 2023
LBT-based Resource Allocation Schemes Utilizing Periodicity of Traffic in LPWAN
Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta and Takeo Fujii
IEICE Technical Report, 14 Jun. 2023, The Institute of Electronics, Information and Communication Engineers
Time Frame Design and Evaluation of the Number of Transmittable Bits for Differential Packet-Level Index Modulation
Hitoshi Yamasaki, Mai Ohta, Hiroki Matsuura and Makoto Taromaru
IEICE Technical Report, 11 May 2023, The Institute of Electronics, Information and Communication Engineers
B-17-23 自律分散制御における干渉回避のための送信待機期間の決定法
09 Mar. 2023
B-17-22 残余空きリソース長に基づくパケット長制御…
09 Mar. 2023
B-17-13 実機による差動化 PLIM のシンボル誤り率評価
08 Mar. 2023
Transmission channel selection scheme with multi-armed bandit algorithm for IEEE 802.11be wireless LAN
Kazuto Yano, Keiichiro Mori, Babatunde Ojetunde, Takashi Imanaka, Mai Ohta and Makoto Taromaru
IEICE Technical Report, 26 Jan. 2023, The Institute of Electronics, Information and Communication Engineers
Packet-Level Index Modulation in Duty Cycle Constraints for Each Frequency Channel
Hiroto Shida, Kosuke Suzuki, Koichi Adachi, Osamu Takyu, Mai Ohta and Takeo Fujii
IEICE Technical Report, 15 Nov. 2022, The Institute of Electronics, Information and Communication Engineers
Improvement of Collection Accuracy by Switching Carrier Frequency Offset in PhyC-SN
Toshi Ito, Osamu Takyu, Mai Ohta, Takeo Fujii and Koichi Adachi
IEICE Technical Report, 07 Nov. 2022, The Institute of Electronics, Information and Communication Engineers
Implementation of Packet Level-Index Modulation (Invited Talk)
Mai Ohta, Takeo Fujii, Koich Adachi and Osamu Takyu
IEICE Technical Report, 07 Nov. 2022, The Institute of Electronics, Information and Communication Engineers
Improved Optimal Index Design Considering Transmission Control in Packet-Level Index Modulation (Short Paper)
Ryuji Miyamoto, Osamu Takyu, Hiroshi Fujiwara, Koichi Adachi, Mai Ohta and Takeo Fujii
IEICE Technical Report, 07 Nov. 2022, The Institute of Electronics, Information and Communication Engineers
Spectrum Sharing among Cognitive Radio Nodes (Poster Presentation)
Takashi Imanaka, Mai Ohta and Makoto Taromaru
IEICE Technical Report, 31 Oct. 2022, The Institute of Electronics, Information and Communication Engineers
Highly Detectable Collision Detection in PhyC-SN by Receiving Antenna Selection (Poster Presentation)
Toshi Ito, Osamu Takyu, Mai Ohta, Takeo Fujii and Koichi Adachi
IEICE Technical Report, 31 Oct. 2022, The Institute of Electronics, Information and Communication Engineers
Channel Activity Detection Based Index Mapping Scheme for Packet-Level Index Modulation
Kosuke Suzuki, Koichi Adachi, Mai Ohta, Osamu Takyu and Takeo Fujii
IEICE Technical Report, 25 Aug. 2022, The Institute of Electronics, Information and Communication Engineers
Resource allocation scheme utilizing clock drift in LPWAN
Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta and Takeo Fujii
IEICE Technical Report, 25 Aug. 2022, The Institute of Electronics, Information and Communication Engineers
Packet-level Index Modulation under Duty Cycle constraints
Ryogo Oya, Shinichiro Kakuda, Takeo Fujii, Osamu Takyu, Mai Ohta and Koichi Adachi
IEICE Technical Report, 13 Jul. 2022, The Institute of Electronics, Information and Communication Engineers
High-Sensitivity Detection Method for Signals in PhyC-SN
Toshi Ito, Osamu Takyu, Mai Ohta, Takeo Fujii and Koichi Adachi
IEICE Technical Report, 13 Jul. 2022, The Institute of Electronics, Information and Communication Engineers
Optimal Index Design for Aggregation Accuracy in Packet Level Index Modulation (Short Paper)
Ryuji Miyamoto, Osamu Takyu, Hiroshi Hujiwara, Koichi Adachi, Mai Ohta and Takeo Fujii
IEICE Technical Report, 13 Jul. 2022, The Institute of Electronics, Information and Communication Engineers
Performance Evaluation of Highly Efficient Information Collection Methods by Trend Analysis of Sensor Information Using Pre-learning
Ryuji Miyamoto, Osamu Takyu, Hiroshi Fujiwara, Koichi Adachi, Mai Ohta and Takeo Fujii
IEICE Technical Report, 11 May 2022, The Institute of Electronics, Information and Communication Engineers
B-17-12 物理量変換一括収集法における周波数オフセットとエネルギー検知を併用した衝突検知
16 Mar. 2022
B-17-11 イベント位置推定を活用したセンサ情報の傾向分析による高効率な情報収集法
16 Mar. 2022
B-5-87 LPWANにおける通信の周期性を活かしたリソース割り当て法
15 Mar. 2022
B-5-86 複数周波数チャネルを用いるパケット型インデックス変調の実機評価
15 Mar. 2022
Study on transmission channel selection scheme with multi-armed bandit algorithm for IEEE 802.11 wireless LAN
Kazuto Yano, Kenta Suzuki, Babatunde Ojetunde, Takashi Imanaka, Mai Ohta and Makoto Taromaru
IEICE Technical Report, 02 Mar. 2022, The Institute of Electronics, Information and Communication Engineers
Impact of Clock Drift in Differential Packet-Level Index Modulation
Mai Ohta and Takeo Fujii
IEICE Technical Report, 02 Mar. 2022, The Institute of Electronics, Information and Communication Engineers
Adaptive channel selection by co-channel interference power and occupancy estimation method in LoRa
Gaku Kobayashi, Osamu Takyu, Koichi Adachi, Mai Ohta and Takeo Fujii
IEICE Technical Report, 24 Jan. 2022, The Institute of Electronics, Information and Communication Engineers
Resource Allocation for Periodic Traffic in LPWAN
Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta and Takeo Fujii
IEICE Technical Report, 16 Dec. 2021, The Institute of Electronics, Information and Communication Engineers
Flexible Index Mapping Scheme for Packet-Level Index Modulation
Kosuke Suzuki, Koichi Adachi, Mai Ohta, Osamu Takyu and Takeo Fujii
IEICE Technical Report, 16 Dec. 2021, The Institute of Electronics, Information and Communication Engineers
Channel selection with multi-armed bandit algorithm based on delay time
Takashi Imanaka; Mai Ohta; Makoto Taromaru
2021 International Conference on Emerging Technologies for Communications (ICETC), Dec. 2021, IEICE
Study on Differential Packet-Level Index Modulation for LPWA
Mai Ohta and Takeo Fujii
IEICE Technical Report, 04 Nov. 2021, The Institute of Electronics, Information and Communication Engineers
Reinforcement Learning-aided Autonomous Decentralized Packet Transmission Control in LoRaWAN
Aoto Kaburaki, Koich Adachi, Osamu Takyu, Mai Ohta and Takeo Fujii
IEICE Technical Report, 14 Jul. 2021, The Institute of Electronics, Information and Communication Engineers
Clock Drift Estimation and Compensation for Packet-Level Index Modulation
Kohei Tsurumi, Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta and Takeo Fujii
IEICE Technical Report, 14 Jul. 2021, The Institute of Electronics, Information and Communication Engineers
B-17-28 パケット型インデックス変調方式における干渉回避法の一検討
12 Mar. 2021
B-17-27 チャープ復調を利用した干渉源の占有率推定及び干渉・雑音電力推定法の提案
12 Mar. 2021
B-17-26 複数チャネル環境下における干渉電力分布を用いたLPWA向けチャネル選択手法の検討
12 Mar. 2021
B-5-137 複数周波数チャネルを考慮した自律分散型パケット衝突回避法
12 Mar. 2021
B-5-136 パケット型インデックス変調を用いるLoRaWANの実装評価
12 Mar. 2021
B-5-135 パケット型インデックス変調におけるクロックドリフト補償法
12 Mar. 2021
B-17-24 制御信号の送信回数からマスタが接続チャネルを選択するランデブチャネル法
10 Mar. 2021
B-6-6 ワイヤレスSDNのための将来スループット予測の検討
09 Mar. 2021
Channel Selection Method with Multi-Armed Bandit Algorithm for Spectrum Sharing
Takashi Imanaka; Mai Ohta; Makoto Taroumaru
IEICE Technical Report, 18 Jan. 2021, The Institute of Electronics, Information and Communication Engineers
送信パケット長に応じたチャネル選択手法の検討 ～冗長検査情報を用いる通信品質要因解析に基づく無線アクセス技術の研究開発～
T. Imanaka; M. Ohta; M. Taromaru; K. Yamamoto; K. Yano
IEICE Technical Report, 17 Aug. 2020, 電子情報通信学会
B-17-43 チャープ復調を利用した干渉電力推定法の提案
20 Mar. 2020
B-17-32 誤検出と誤警報を考慮したランデブチャネル法の評価…
20 Mar. 2020
B-5-122 LoRaWANにおける外部干渉検知システムにおける学習パラメータ再初期化
17 Mar. 2020
B-5-121 IoTにおける送信タイミングの自律分散的制御法の検討
17 Mar. 2020
Adapting the number of replicas in the E-IRSA system using the power control
Toshiki Nonaka; Takeo Fujii; Osamu Takyu; Mai Ohta
International Conference on Information Networking, 07 Jan. 2020, IEEE Computer Society
On Relation between Eigenvalue Distribution of Single-User MIMO Transmission and Direction-of-Arrival of Multipath Incident Waves
Makoto Taromaru; Hironori Ban; Mai Ohta
IEICE Technical Report, 13 Nov. 2019, The Institute of Electronics, Information and Communication Engineers
B-17-22 一括集約型無線センサネットワークにおける高密度データ分離を実現する送信制御法
12 Sep. 2019
B-15-15 一括集約型無線センサネットワークにおける姿勢制御への応用
11 Sep. 2019
B-5-81 階層型擬似二部グラフによるE-IRSAのレプリカ送信回数の最適化
10 Sep. 2019
B-5-80 LoRaWANにおける深層強化学習を用いた直交リソース割り当て法における報酬値の影響に関する検討
10 Sep. 2019
B-17-2 無線LANのパケット解析による隠れ端末状態の識別法
20 Mar. 2019
Data separation considering smoothness of sensing data in physical wireless parameter conversion sensor networks
Shuhei Yamasaki; Osamu Takyu; Keiichiro Shirai; Takeo Fujii; Mai Ohta; Fumihito Sasamori; Shiro Handa
33rd International Conference on Information Networking(ICOIN), Jan. 2019, IEEE
On beam-pattern and nulls toward interferences in multiuser MIMO using null-space extension
H. Ban; M. Taromaru; M. Ohta
Technical Committee on Smart Radio (SR), (SmartCom2018), 31 Oct. 2018, The Institute of Electronics, Information and Communication Engineers
Relationship between interference-wave suppression using null-space extension in multiuser MIMO and formed beam-pattern
H. Ban; M. Taromaru; M. Ohta
IEICE Technical Report, 20 Jun. 2018, The Institute of Electronics, Information and Communication Engineers
B-17-28 IFDMAと非線形増幅を利用したアクセスチャネル不整合補償法の実験的検討
21 Mar. 2018
B-17-27 マルチチャネル通知法を利用した制御信号交換プロトコルの提案
21 Mar. 2018
B-17-26 非線形占有率測定を利用したACIを回避するマルチチャネル通知法
21 Mar. 2018
B-17-23 2.4GHz帯ISMバンドにおける電子レンジからの電磁波識別法の一検討
21 Mar. 2018
B-17-21 無線機のシステム間干渉耐性能力の明確化と識別方法
21 Mar. 2018
B-17-20 センシングデータが揺らぐ環境における物理量一括収集法の検討
21 Mar. 2018
B-17-15 920MHz帯LoRaを用いた伝搬路特性の一報告
21 Mar. 2018
B-17-19 LPWA通信における異種無線システムの周波数共用における干渉耐性能力の評価
21 Mar. 2018
B-5-108 ランダムアクセスにおけるクラウド協調を用いた衝突解決型無線センサネットワーク
20 Mar. 2018
A Study on Array Beam Pattern of Multi-User MIMO Basestation Using Null-Space Dimension Expansion: About Principle of Tolerance Improvement against Channel Fluctuation by Orthogonalizing the Past Interference Channels
TAROMARU Makoto; BAN Hironori; OHTA Mai; MOTEGI Daisuke
09 Nov. 2017, The Institute of Electronics, Information and Communication Engineers (IEICE)
A Study on Beam Pattern of Array with Multi-User MIMO Using Null-Space Expansion Tolerant to Channel Fluctuation
BAN Hironori; Daisuke Motegi; TAROMARU Makoto; OHTA Mai
SmartCom2017, 24 Oct. 2017, Technical Committee of Smart Radio, The Institute of Electronics, Information and Communication Engineers (IEICE)
A Study on Frequency Asynchronous Spectrum Hole Detection Method
Mai Ohta; Takeo Fujii; Osamu Takyu; Makoto Taromaru
SmartCom2017, Oct. 2017, IEICE
B-17-35 実測に基づく推定座標を利用した重み付け屋内測位
23 Mar. 2017
B-17-29 多数測定者によるクラウドソーシングを想定したTV放送信号の受信実験
23 Mar. 2017
B-17-28 占有率・遷移率測定における尤度選択時に用いる最適閾値の設計
23 Mar. 2017
B-17-27 IFDMAと非線形増幅を利用したアクセスチャネルの異なる狭帯域受信機での情報伝送法
23 Mar. 2017
B-17-13 機械から発生する干渉性電磁波とロバストチャネル選択法
23 Mar. 2017
B-17-11 複数周波数を利用する無線アドホックネットワークにおける電力制御を伴う経路構築
23 Mar. 2017
B-17-10 無線物理量変換を活用した周波数オフセット補償機能付き複数情報一括収集法
23 Mar. 2017
Spectrum Edge Decision Method for Energy Detection with FFT
OHTA Mai; TAROMARU Makoto; FUJII Takeo; TAKYU Osamu
IEEE ICOIN 2017, 12 Jan. 2017, IEEE
B-17-4 K-Shortest Pass法を用いた一括収集法における信号分離法
22 Sep. 2016
B-17-3 物理量変換一括収集法における周波数オフセットを利用したデータトラッキングの一検討
22 Sep. 2016
B-17-1 ダイナミックスペクトラムアクセス型コグニティブ無線における無線LANへの実機による影響評価
22 Sep. 2016
A study on energy detection with FFT in cognitive radio systems for improving detection performance
Mai Ohta; Makoto Taromaru; Takeo Fujii; Osamu Takyu
SmartCom 2016, 16 May 2016, IEICE
Novel Two-Stage Spectrum Sensing for Energy Detection with FFT
Mai Ohta; Osamu Takyu; Takeo Fujii; Makoto Taromaru
IEEE WCNC 2016 International Workshop on Smart Spectrum, 03 Apr. 2016, IEEE
B-5-186 DFT等の有限時間区間のフーリエ変換を用いた実時間スペクトラム観測法に関する一考察
18 Mar. 2016
B-5-185 アナログトランスバーサルフィルタを用いた時間周波数二次元AGCの回路構成
18 Mar. 2016
B-5-109 ヌル空間拡張法マルチユーザMIMOのウエイト生成に関する考察
18 Mar. 2016
B-17-40 干渉波のチャネル変動耐性を向上させるアダプティブアレーの自由度とウエイト生成について
17 Mar. 2016
B-17-35 帰還型信号・雑音電力推定を適用した占有率・遷移率測定法の評価
17 Mar. 2016
B-17-29 物理量変換一括収集法の無線センサネットワークにおけるセンシングデータの傾向に基づいたシリアル干渉キャンセラ
16 Mar. 2016
B-17-26 時間シフトを利用した電力検出器によるセンシング特性改善法の検討
16 Mar. 2016
B-17-25 占有率・遷移率のクラスタ化における無線LAN環境評価
16 Mar. 2016
A White-Space Width Estimation with Windowed FFT Based Energy Detection
Mai Ohta; Osamu Takyu; Takeo Fujii; Makoto Taromaru
2016 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing, Mar. 2016
Information mapping parameter control method for physical wireless parameter conversion sensor networks
Taiki Nakayama; Takeo Fujii; Osamu Takyu; Mai Ohta
NCSP'16, Mar. 2016
Highly Efficient Environment Aware Wireless Sensor Network
Takeo Fujii; Shunsuke Takagi; Taiki Nakayama; Mai Ohta; Osamu Takyu
IEEE CCNC 2016, 11 Jan. 2016, IEEE
Signal Bandwidth Estimation with Energy Detector Based on Windowed FFT for Cognitive Radio System
Kensaku Tamayama; Mai Ohta; Makoto Taromaru
The 6th International Conference on ICT Convergence, 28 Oct. 2015
A study on null-space dimension expansion for muti-user MIMO tolerant to channel fluctuation -- About propagation model and mechanism of performance improvement by using past interference channel --
TAROMARU Makoto; OHTA Mai
IEICE Technical Report, 28 Oct. 2015, The Institute of Electronics, Information, and Communication Engineers
On Degree of Freedom and Weight of Adaptive Array Antenna to Tolerate Channel Varying of Interferences (2) - A Study on Propagation Mechanism and Element Spacing
Joint Conference of Electrical and Electronics Engineers in Kyushu, 26 Sep. 2015, Committee of Joint Conference of Electrical, Electronics and Information Engineers in Kyushu
On Degree of Freedom and Weight of Adaptive Array Antenna to Tolerate Channel Varying of Interferences (1) - Relation between Previous Channels and Interference Subspace
Joint Conference of Electrical and Electronics Engineers in Kyushu, 26 Sep. 2015, Committee of Joint Conference of Electrical, Electronics and Information Engineers in Kyushu
B-17-11 Effect of Accessing Rate in Learning Assisted Evaluation to Tradeoff between Discovery Rate of Vacant Channel and Traceability of Evaluated Channel Occupancy Rate
KIMURA Takumi; TAKYU Osamu; FUJII Takeo; OHTA Mai; HANDA Shiro; SASAMORI Fumihito
Society Conference of IEICE, 10 Sep. 2015, The Institute of Electronics, Information and Communication Engineers
B-17-9 Decomposition of Sensing Results with Multi-Target Tracking based on Belief Propagation in Simultaneous Wireless Data Collection Method
ORIUCHI M.; TAKYU O.; SHIRAI K.; FUJII T.; OHTA M.; SASAMORI F.; HANDA S.
Society Conference of IEICE, 10 Sep. 2015, The Institute of Electronics, Information and Communication Engineers
B-17-10 Evaluation of Practical Used Sub-Carriers for Cluster Heads in Wireless Sensor Networks of Wireless Physical Conversion
FUJII Shohei; TAKYU Osamu; FUJII Takeo; OHTA Mai; SASAMORI Fumihito; HANDA Shiro
Society Conference of IEICE, 10 Sep. 2015, The Institute of Electronics, Information and Communication Engineers
High speed and small signaling overhead rendezvous in cognitive radio system
Tsukasa Yoneda; Osamu Takyu; Mai Ohta; Takeo Fujii; Fumihito Sasamori; Shiro Handa
Aug. 2015
An effect evaluation of leakage with windowed FFT based energy detection for narrowband signal detection
Mai Ohta; Osamu Takyu; Takeo Fujii; Makoto Taromaru
SR, 29 Jul. 2015, IEICE
Performance evaluation of a leakage suppression method for a bandwidth estimation based on energy detection with FFT
Kensaku Tamayama; Mai Ohta; Osamu Takyu; Takeo Fujii; Makoto Taromaru
SR, 01 May 2015, IEICE
B-17-27 Optimal Access Control in Wireless Sensor Networks using Wireless Physical Parameters
FUJII Shohei; TAKYU Osamu; FUJII Takeo; OHTA Mai; SASAMORI Fumihito; HANDA Shiro
IEICE General Conference, 12 Mar. 2015, The Institute of Electronics, Information and Communication Engineers
B-17-38 Study of Measurement for Channel Occupancy Ratio and Channel Transition Ratio in Multi-Channel Wireless Commumication
Soya Hayato; Takyu Osamu; Fujii Takeo; Ohta Mai; Sasamori Humihito; Handa Sirou
IEICE General Conference, 12 Mar. 2015, The Institute of Electronics, Information and Communication Engineers
B-17-11 Decomposition of Sensing Results with Multi-Target Tracking based on Belief Propagation in Simultaneous Wireless Data Collection Method
ORIUCHI Minato; TAKYU Osamu; SHIRAI Keiichiro; FUJII Takeo; OHTA Mai; SASAMORI Fumihito; HANDA Shiro
IEICE General Conference, 11 Mar. 2015, The Institute of Electronics, Information and Communication Engineers
B-17-24 Channel Unifying in Multi Points to Point Wireless Sensor Network by USRP
KIMURA Takumi; TAKYU Osamu; FUJII Takeo; OHTA Mai; SASAMORI Fumihito; HANDA Shiro
IEICE General Conference, 11 Mar. 2015, The Institute of Electronics, Information and Communication Engineers
B-5-130 アナログトランスバーサルフィルタを用いた時間周波数二次元AGCの基本構成
10 Mar. 2015
B-5-9 CPFSKをOQPSKで拡散するDS-SS方式の基本特性
10 Mar. 2015
Spectrum sensing and channel utilization prediction by Nth-order Markov chain model
Ryota Nakanishi; Mai Ohta; Makoto Taromaru
IEEE WCNC 2015 International Workshop on Smart Spectrum, 09 Mar. 2015, IEEE
実環境を考慮したPS状態予測に基づく協調予測の検討
NAKANISHI Ryota; OHTA Mai; TAROMARU Makoto
電子情報通信学会 総合大会, 12 Mar. 2015, IEICE
Transmission decision algorithm for updating sensing information
Mai OHTA; Osamu TAKYU; Takeo FUJII; Makoto TAROMARU
SDR-WInnComm-Europe 2014, 04 Nov. 2014
Prediction of Next ON/OFF State of Primary System by N-order Markov Chain
Ryota Nakanishi; Mai Ohta; Makoto Taromaru
SmartCom 2014, 30 Oct. 2014, IEICE
Prediction of Next ON/OFF State of Primary System by Nth-order Markov Chain(Poster session)
Nakanishi Ryota; Ohta Mai; Taromaru Makoto
IEICE technical report. SR, Smart radio, 30 Oct. 2014, The Institute of Electronics, Information and Communication Engineers
A Study on Undesired Spectrum Detection Method with FFT
Ryota Higashi; Mai Ohta; Osamu Takyu; Takeo Fujii; Makoto Taromaru
SR, 30 Oct. 2014, IEICE
Data Tracking in Wireless Sensor Network of Simultaneous Data Collection Scheme
TAKYU Osamu; YAMAKITA Takayuki; FUJII Takeo; SHIRAI Keiichiro; OHTA Mai; SASAMORI Fumihito; HANDA Shiro
IEICE technical report. SR, Smart radio, 23 Oct. 2014, The Institute of Electronics, Information and Communication Engineers
B-17-10 無線センサネットワークにおける狭帯域直交信号とBluetooth信号の識別に関する一検討
25 Sep. 2014
B-5-79 CPFSK一次変調をOQPSKで拡散するDS-SS方式の一検討―拡散変調の同相・直交成分に同一符号を割り当てた時のスペクトル―
23 Sep. 2014
B-17-23 学習型占有率測定法を用いたランデブチャネルの接続割合の準最適設計
19 Mar. 2014
B-17-22 制御信号の発信回数を抑えたランデブチャネル法
19 Mar. 2014
B-17-21 一括集約型無線センサネットワークへのデータトラッキングの適用と周波数オフセットの影響
19 Mar. 2014
B-17-9 協調センシングにおける自律的センシング情報伝送のための一検討
18 Mar. 2014
B-17-4 無線センサネットワークに適した周波数オフセット補償法の改良
18 Mar. 2014
B-17-3 無線センサネットワークに適した周波数オフセット補償法の検討
18 Mar. 2014
Adaptive interval of information updating toward database for cognitive radio based on information reliability
Mai Ohta; Osamu Takyu; Takeo Fujii; Makoto Taromaru
IEICE Software Radio, 05 Mar. 2014
A study on repetition of information update based on reliability of database in cognitive radio
Mai Ohta; Makoto Taromaru; Osamu Takyu; Takeo Fujii
2014 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing, 02 Mar. 2014
High efficient multiple sensing information gathering for wireless sensor networks
Takeo Fujii; Mai Ohta; Tomomi Endo
Jul. 2013
B-17-35 An Evaluation of Control Channel Selection Method by Using Distributed Generating Channel List for Spectrum Shared Cognitive RadioSystems
Ohta Mai; Fujii Takeo
IEICE General Conference, 21 Mar. 2013, The Institute of Electronics, Information and Communication Engineers
Control Channel Selection for Expanding White Space Length using Channel Statistic Information with Observation Error
Mai Ohta; Takeo Fujii
NCSP'13, Mar. 2013
B-17-4 An Evaluation based on Measurement of Control Channel Selection Method for Spectrum Shared Cognitive Radio Systems
Ohta Mai; Kimura Takamasa; Imam Hasan Rajib; Rocke Sean; Su Jingkai; Wyglinski Alexander M.; Fujii Takeo
IEICE General Conference, 22 Mar. 2012, The Institute of Electronics, Information and Communication Engineers
Spectrum Sharing Method using Frequency Priority Table for Reducing Interference among Secondary Systems
Kazuhisa Okamoto; Mai Ohta; Kei Inage; Takeo Fujii; Masayuki Ariyoshi
SDR'11-WinnComm, Nov. 2011
Demonstration of Vehicle to Vehicle Communications over TV White SpaceOnur Altintas; Mitsuhiro Nishibori; Takuro Oshida; Chikara Yoshimura; Youhei Fujii; Kota Nishida; Yutaka Ihara; Masahiro Saito; Kazuya Tsukamoto; Masato Tsuru 0001; Yuji Oie; Rama Vuyyuru; AbdulRahman Al-Abbasi; Masaaki Ohtake; Mai Ohta; Takeo Fujii; Si Chen; Srikanth Pagadarai; Alexander M. Wyglinski
Proceedings of the 74th IEEE Vehicular Technology Conference, Sep. 2011, IEEE
Iterative Cooperative and sensing on shared primary spectrum for improving sensing ability
Mai Ohta; Takeo Fujii; Kazushi Muraoka; Masayuki Ariyoshi
IEEE DySPAN2011, May 2011, IEEE
B-17-16 Frequency Sharing Method with Frequency Priority Table for Decreasing Interference among Secondary Systems
Okamoto Kazuhisa; Ota Mai; Inage Kei; Fujii Takeo
IEICE General Conference, 15 Mar. 2011, The Institute of Electronics, Information and Communication Engineers
A study of cooperative sensing method with iterative sensing information exchange on shared spectrum of primary system
Mai Ohta; Takeo Fujii
Triangle Symposium on Advanced ICT 2010 (TriSAI 2010), Oct. 2010
B-17-22 A Study of Cooperative Sensing Method with Iterative Sensing Information Exchange on Shared Spectrum of Primary System
Ohta Mai; Fujii Takeo
Society Conference of IEICE, 17 Sep. 2010, The Institute of Electronics, Information and Communication Engineers
B-17-19 A Performance Evaluation of Cooperative Sensing Information Collection Method under the Same Spectrum with Primary System
Ohta Mai; Fujii Takeo; Muraoka Kazushi; Ariyoshi Masayuki
IEICE General Conference, 17 Mar. 2009, The Institute of Electronics, Information and Communication Engineers
An OFDM based sensing information exchange for cooperative sensing in cognitive radio systems
Mai Ohta; Takeo Fujii
Triangle Symposium on Advanced ICT 2010 (TriSAI2008), 2008
B-17-15 An OFDM Based Information Exchange for Cooperative Sensing in Cognitive Radio Systems
Ota Mai; Fujii Takeo; Muraoka Kazushi; Ariyoshi Masayuki
IEICE General Conference, 18 Mar. 2008, The Institute of Electronics, Information and Communication Engineers
