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Masazumi UEBA

Switchable Multi-Frequency MMIC Oscillator for the 60 GHz Millimeter Wave Band Eddy TAILLEFER Shoichi KITAZAWA Masazumi UEBA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2010/04/01 Vol. E93-C No. 4 pp. 497-504 Type of Manuscript: PAPER Category: Microwaves, Millimeter-Waves Keyword: proof-of-concept, oscillator, MMIC, switched-capacitor, millimeter wave band, GaAs p-HEMT,
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60-GHz-Band Switched-Beam Eight-Sector Antenna with SP8T Switch for 180 Azimuth Scan Amane MIURA Masataka OHIRA Shoichi KITAZAWA Masazumi UEBA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2010/03/01 Vol. E93-B No. 3 pp. 551-559 Type of Manuscript: PAPER Category: Devices/Circuits for Communications Keyword: millimeter wave, wireless LAN, switched-beam antenna, multi-sector antenna, single-pole eight-throw switch,
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A Prototype Modem for Hyper-Multipoint Data Gathering SATCOM Systems --- A Group Modem Applicable to Arbitrarily and Dynamically Assigned FDMA Signals --- Kiyoshi KOBAYASHI Fumihiro YAMASHITA Jun-ichi ABE Masazumi UEBA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2009/11/01 Vol. E92-B No. 11 pp. 3318-3325 Type of Manuscript: Special Section PAPER (Special Section on Satellite Communication Technologies in Conjunction with Main Topics of JC-SAT2008) Category: Keyword: FFT filter bank, group modem, hyper-multipoint data gathering, arbitrary and dynamic frequency assignment, satellite communication,
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Performance of Pre-FFT Type MMSE Adaptive Array Antenna with Iterative Weight Update in Presence of Sporadic Intra-System Interference Kazuto YANO Makoto TAROMARU Masazumi UEBA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2009/05/01 Vol. E92-B No. 5 pp. 1852-1859 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: pre-FFT type adaptive array antenna, sporadic interference suppression, OFDM, indoor LOS propagation, packet transmission, IEEE 802.11a,
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Deformed Antenna Pattern Compensation Technique for Multi-Beam Antennas in Broadband and Scalable Mobile Communications Satellites Yoshinori SUZUKI Satoshi HARADA Kiyoshi KOBAYASHI Masazumi UEBA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2007/09/01 Vol. E90-B No. 9 pp. 2280-2287 Type of Manuscript: Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation) Category: Antennas Keyword: communication satellite, onboard antenna, multi-beam, phased array,
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Communication Capacity and Quality Enhancement Using a Two-Layered Adaptive Resource Allocation Scheme for Multi-Beam Mobile Satellite Communication Systems Katsuya NAKAHIRA Kiyoshi KOBAYASHI Masazumi UEBA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/07/01 Vol. E89-A No. 7 pp. 1930-1939 Type of Manuscript: Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks) Category: Keyword: mobile satellite communication, multi beam, resource allocation, capacity enhancement, QoS, optimization,
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Layer 3 Diversity Reception Technology for Ku-Band Mobile Satellite Communication Systems Fumiaki NAGASE Jin MITSUGI Masayoshi NAKAYAMA Masazumi UEBA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2006/06/01 Vol. E89-B No. 6 pp. 1856-1861 Type of Manuscript: PAPER Category: Satellite Communications Keyword: mobile satellite communications, shadowing, diversity reception, layer 3,
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Seamless Symbol Rate Switching Scheme for Multi-Rate FDMA Modem Fumihiro YAMASHITA Kiyoshi KOBAYASHI Kohei OHATA Masazumi UEBA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2006/02/01 Vol. E89-B No. 2 pp. 545-555 Type of Manuscript: PAPER Category: Satellite Communication Keyword: symbol rate, satellite communications, seamless switching, modem,
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Enhanced Multi-Correlator AFC for Fast and Wide Range Frequency Acquisition Fumihiro YAMASHITA Kiyoshi KOBAYASHI Yoshinori NAKASUGA Jin MITSUGI Masazumi UEBA
Publication: IEICE TRANSACTIONS on Communications Publication Date: 2004/08/01 Vol. E87-B No. 8 pp. 2072-2081 Type of Manuscript: Special Section PAPER (Special Section on Recent Fundamental Technologies for Broadband Satellite Communications) Category: Keyword: AFC, correlators, satellite communications, large acquisition range,
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