Search Results 1-20 of 544

  • CU-MAC: A MAC Protocol for Centralized UAV Networks with Directional Antennas

    LI Aijing , WU Guodong , DONG Chao , ZHANG Lei

    … Meanwhile, due to their ability to provide lower delay and higher data rates, more UAVs are using frequently directional antennas. … However, it is challenging to support different QoS in UAV networks with directional antennas, because of the high mobility of UAV which causes serious channel resource loss. … In this paper, we propose CU-MAC which is aMAC protocol for Centralized UAV networks with directional antennas. …

    IEICE Transactions on Communications, 2019

    J-STAGE 

  • Concurrent Transmission Scheduling for Perceptual Data Sharing in mmWave Vehicular Networks

    TAYA Akihito , NISHIO Takayuki , MORIKURA Masahiro , YAMAMOTO Koji

    … One of the challenges of data sharing in mmWave communications is broadcasting because narrow-beam directional antennas are used to obtain high gain. … The proposed algorithm realizes concurrent transmission to improve spatial reuse by designing a rule that is utilized to determine if the two pairs of transmitters and receivers interfere with each other by considering the radio propagation characteristics of narrow-beam antennas. …

    IEICE Transactions on Information and Systems E102.D(5), 952-962, 2019

    J-STAGE 

  • Experimental Consideration on Loop Antenna Fed by NRD-guide at Millimeter-wave Bands  [in Japanese]

    千田 純一 , 黒木 太司 , 江口 正徳 , 川原 祐紀 , 上野 雄也 , 深瀬 唯正

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 118(361), 79-82, 2018-12-13

  • Loop Antenna Fed by NRD-guide at Millimeter-wave Bands  [in Japanese]

    千田 純一 , 黒木 太司

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 117(463), 1-4, 2018-03-01

  • Loop Antenna Fed by NRD-guide at Millimeter-wave Bands  [in Japanese]

    千田 純一 , 黒木 太司

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 117(462), 1-4, 2018-03-01

  • Terahertz Plasmonics and Nano-Carbon Electronics for Nano-Micro Sensing and Imaging

    Deng Xiangying , Kawano Yukio

    … We introduce novel plasmonic structures and their performance, including a Si-immersed bull's-eye antenna and multi-frequency bull's-eye antennas. … The latter part of this paper explains carbon-based THz detectors and their applications in omni-directional flexible imaging. …

    International Journal of Automation Technology 12(1), 87-96, 2018

    J-STAGE 

  • Reduction of quantization error using auxiliary antenna on array antenna

    Mamiya Takuro , Fujimoto Mitoshi

    … <p>A quantization error caused by digital amplitude adjusters and phase shifters on array antennas leads to deterioration of directional patterns. …

    IEICE Communications Express 7(10), 347-351, 2018

    J-STAGE 

  • Reduction of Quantization Error using Auxiliary Antenna on Array Antenna

    Mamiya Takuro , Fujimoto Mitoshi

    … <p>A quantization error caused by digital amplitude adjusters and phase shifters on array antennas leads to deterioration of directional patterns. …

    IEICE Communications Express, 2018

    J-STAGE 

  • Dynamic Group-Based Antenna Selection for Uplink Multi-User MIMO in Distributed Antenna System

    YOSHIDA Sho , NISHIMORI Kentaro , ITO Soichi , MURAKAMI Tomoki , ISHIHARA Koichi , TAKATORI Yasushi

    … All AP antennas are divided into groups, and the received signal in each group is input to the amplitude detector via a directional coupler. …

    IEICE Transactions on Communications E101.B(7), 1552-1560, 2018

    J-STAGE 

  • Fabrication of Integrated PTFE-Filled Waveguide Butler Matrix for Short Millimeter-Wave by SR Direct Etching

    KISHIHARA Mitsuyoshi , TAKEUCHI Masaya , YAMAGUCHI Akinobu , UTSUMI Yuichi , OHTA Isao

    … First, a cruciform 3-dB directional coupler and an intersection circuit (0-dB coupler) are designed at 180 GHz. … Then, a 4×4 Butler matrix with horn antennas is designed and fabricated. …

    IEICE Transactions on Electronics E101.C(6), 416-422, 2018

    J-STAGE 

  • Equilateral Triangular Slot Antenna for Communication System and GNSS RO Sensor of GAIA-I Microsatellite

    AWALUDIN Asif , TETUKO SRI SUMANTYO Josaphat , ITO Koichi , GAO Steven , MUNIR Achmad , ZAFRI BAHARUDDIN Mohd , EDI SANTOSA Cahya

    … <p>Two wideband circularly polarized (CP) equilateral triangular slot (ETS) antennas are proposed for communication system and the Global Navigation Satellite System (GNSS) Radio Occultation (RO) sensor of the GAIA-I microsatellite. … These wide slot antennas use the ring slot antenna CP generation method due to their shape. … The compact antennas employ truncated corners, grounded equilateral triangular perturbation patch and branched feed line to create CP radiation. …

    IEICE Transactions on Communications E101.B(3), 835-846, 2018

    J-STAGE 

  • Dynamic Group-based Antenna Selection for Uplink Multi-user MIMO in Distributed Antenna System

    YOSHIDA Sho , NISHIMORI Kentaro , ITO Soichi , MURAKAMI Tomoki , ISHIHARA Koichi , TAKATORI Yasushi

    … All AP antennas are divided into groups, and the received signal in each group is input to the amplitude detector via a directional coupler. …

    IEICE Transactions on Communications, 2018

    J-STAGE 

  • Vertically polarized omni-directional loop slot array antenna for mobile base station

    Kaneda Ryosuke , Arai Hiroyuki

    … <p>A slim vertically polarized omni-directional feed circuit integrated loop slot antenna for mobile base station is proposed in this paper. … The proposed antenna consists of loop slots and patches to improve omni-directional pattern and bandwidth. … In order to enhance the directivity gain, we arrange two loop slot antennas to be excited out of phase by a microstrip line. …

    IEICE Communications Express 6(6), 254-258, 2017

    J-STAGE 

  • Communication Characteristic Verification for Wi-Fi use in Marine Equipment  [in Japanese]

    Shimizu Etsuro , Nagai Takato , Fujie Ryosuke , Umeda Ayako

    … In order to cover wide areas, it is necessary to use in cooperation with several antennas since the long-range communication is achieved by using the directional antenna. …

    The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2017(0), 2P1-G09, 2017

    J-STAGE 

  • Experimental study of incoming waves separating adaptive array for ISDB-T mobile reception

    Tabata Takanobu , Fujimoto Mitoshi , Hori Satoshi , Wada Tomohisa , Asato Hirokazu

    … Furthermore, most of the mobile reception system, 4 antennas are mounted on a vehicle (Front: 2 antennas, Rear: 2 antennas).</p><p>The authors proposed a new combing method (Incoming waves separating system by adaptive array antenna). … In this paper, the performances in case of 4 directional antennas are evaluated. …

    IEICE Communications Express 6(11), 627-632, 2017

    J-STAGE 

  • WAVE MEASUREMENT BY PI-SAR2 ATI_K  [in Japanese]

    KOJIMA Shoichiro

    … The wave height distributions are estimated form theorytical directional wave spectra. … The antennas for the along track interfereometry in Pi-SAR2 couldn't measure the sea surface in the super fine mode with 30 cm resoluteion because these antennas were desined for 300 MHz and 150 MHz bandwidth. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 73(2), I_1675-I_1680, 2017

    J-STAGE 

  • Adaptive Location-Aware Routing with Directional Antennas in Mobile AdHoc Networks  [in Japanese]

    Noguchi Taku , Kobayashi Takahiko

    … Even in location-based routing protocols, with omnidirectional antennas there is some redundant route discovery by blind flooding of route request packets outside the area between the source and destination. … These redundant route discovery propagations can be reduced by using both a scheme of restricted flooding and directional antennas. …

    IEEJ Transactions on Electronics, Information and Systems 137(10), 1310-1319, 2017

    J-STAGE 

  • Design, Fabrication, and Measurement of Constant Gain UWB Planar Antenna Using FSS-Based Reflectors

    YAHYA Rabia , NAKAMURA Akira , ITAMI Makoto , DENIDNI Tayeb A.

    … <p>In this paper, we propose a technique to improve the gain of ultra wide-band (UWB) planar antennas by using low profile reflectors based on frequency selective surfaces (FSS). … This technique not only enhances the gain of the planar UWB antennas but also guarantees a constant gain with weak variation across the entire UWB while keeping their attractive merits such as planar structure and easy fabrication. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E100.A(1), 194-199, 2017

    J-STAGE 

  • Drone Mesh-Networks Using Beamforming Directional Antennas : Link Selection Method based on Beam Width and Angle  [in Japanese]

    木村 共孝 , 平栗 健史 , 西森 健太郎 , 中尾 彰宏

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 116(62), 113-116, 2016-05-24

  • B-8-1 Drone Mesh Networks Using Beamforming Directional Antennas  [in Japanese]

    Kimura Tomotaka , Hiraguri Takefumi , Nishimori Kentaro , Nakao Akihiro

    Proceedings of the IEICE General Conference 2016年_通信(2), 200, 2016-03-01

Page Top