Search Results - "Imai, Tetsuro"

Evaluation of Massive MIMO Considering Real Propagation Characteristics in the 20-GHz Band by Taniguchi, Ryotaro, Nishimori, Kentaro, Kataoka, Ryochi, Kameyama, Kohei, Kitao, Koshiro, Ngochao Tran, Imai, Tetsuro

“…This paper presents multiple-input multiple-output (MIMO) measurements in the 20-GHz band, and evaluates the basic performance of massive MIMO systems when…”
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Study on Drone Handover Methods Suitable for Multipath Interference Due to Obstacles by Hirata, Kakeru, Hiraguri, Takefumi, Kimura, Tomotaka, Matsuda, Takahiro, Imai, Tetsuro, Hirokawa, Jiro, Maruta, Kazuki, Ujigawa, Satoshi

“…Networks constructed in the sky are known as non-terrestrial networks (NTNs). As an example of an NTN, relay transmission using drones as radio stations…”
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Analysis of Wind Effect on Drone Relay Communications by Tajima, Yuya, Hiraguri, Takefumi, Matsuda, Takahiro, Imai, Tetsuro, Hirokawa, Jiro, Shimizu, Hiroyuki, Kimura, Tomotaka, Maruta, Kazuki

“…In this study, we realized a relay network using drones and analyzed the impact of the sway angle of a drone’s attitude on communication in a windy flight…”
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Safety and efficacy of single‐needle leukocyte apheresis for treatment of ulcerative colitis by Shindo, Yoichiro, Mitsuyama, Keiichi, Yamasaki, Hiroshi, Imai, Tetsuro, Yoshioka, Shinichiro, Kuwaki, Kotaro, Yamauchi, Ryosuke, Yoshimura, Tetsuhiro, Araki, Toshihiro, Morita, Masaru, Tsuruta, Kozo, Yamasaki, Sayo, Fukami, Kei, Torimura, Takuji

“…Leukocyte apheresis (LCAP) is a safe and effective treatment for active ulcerative colitis (UC) in Japan. Nevertheless, a limitation of LCAP is its requirement…”
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Study on Characteristics of Human Body Shadowing in High Frequency Bands: Radio Wave Propagation Technology for Future Radio Access and Mobile Optical Networks by Tran, Ngochao, Imai, Tetsuro, Okumura, Yukihiko

“…To address the rapid increase in the volume of data traffic in mobile communication networks, small cells that enable data transmission at a high bit rate and…”
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Interference-Based Decode and Forward Scheme Using Relay Nodes in Heterogeneous Networks by Nishimori, Kentaro, Imai, Tetsuro, Kitao, Koshiro

“…This paper proposes interference-based decode and forward scheme that utilizes relay stations (RSs). In Long-Term-Evolution (LTE-) Advanced, heterogeneous…”
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Polarization Dispersion Characteristics of Propagation Paths in Urban Mobile Communication Environment by Imai, T., Kitao, K.

“…In order to employ MIMO techniques the number of antenna branches must be increased and as a consequence the installation space requirements are increased…”
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Angle of Arrival Characteristics at 20 GHz band in LOS Urban Area Street Cell Environment by Tategami, Koyo, Fujimoto, Mitoshi, Kitao, Koshiro, Imai, Tetsuro

“…In this paper, the SAGE algorithm is applied to measured data acquired by the 20 GHz band channel sounder in a real urban street cell environment, and DOA…”
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Frequency-Agile Pathloss Models for Urban Street Canyons by Haneda, Katsuyuki, Omaki, Nobutaka, Imai, Tetsuro, Raschkowski, Leszek, Peter, Michael, Roivainen, Antti

“…Frequency-agile pathloss models for urban street canyons are discussed in this paper. The models are floating intercept (FI), fixed reference (FR), and ITU-R…”
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Direction-of-Arrival Estimation With Circular Array Using Compressed Sensing in 20 GHz Band by Uemura, Saki, Nishimori, Kentaro, Taniguchi, Ryotaro, Inomata, Minoru, Kitao, Koshiro, Imai, Tetsuro, Suyama, Satoshi, Ishikawa, Hironori, Oda, Yasuhiro

“…The super-high-frequency band is used in the fifth-generation (5G) mobile communication system, and the introduction of massive multiple-input-multiple-output…”
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Study on hybrid method of ray-tracing and physical optics for outdoor-to-indoor propagation channel prediction by Imai, Tetsuro, Okumura, Yukihiko

“…Recently, in order to evaluate the performance of heterogeneous networks, outdoor-to-indoor propagation characteristics have been actively investigated. In…”
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Analysis of cell search performance for W-CDMA cellular system by Imai, Tetsuro, Mori, Shin'ichi

“…Wideband DS‐CDMA (W‐CDMA) has been used as the wireless access system for the IMT‐2000 next‐generation mobile communications system. Since this is an…”
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Novel ray-tracing acceleration technique employing genetic algorithm for radio propagation prediction by Imai, Tetsuro

“…The ray-tracing method is very attractive because several radio propagation characteristics can be simply predicted based on the knowledge of the rays…”
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Path loss prediction model for 800 MHz to 37 GHz in NLOS microcell environment by Kitao, Koshiro, Imai, Tetsuro, Tran, Ngochao, Omaki, Nobutaka, Okumura, Yukihiko, Inomata, Minoru, Sasaki, Motoharu, Yamada, Wataru

“…Fifth generation (5G) mobile communication systems are being actively investigated to increase the system capacity. For 5G, utilizing frequency bands above 6…”
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Performance evaluation by antenna selection using real propagation channel on massive MIMO by Kataoka, Ryochi, Nishimori, Kentaro, Tran, Ngochao, Imai, Tetsuro

“…Massive MIMO enables the improvement on the transmission rate without increasing the burden on the signal processing by employing a large number of antennas at…”
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Investigation of Ray Tracing accuracy in street cell environment in high-SHF band by Omaki, Nobutaka, Kitao, Koshiro, Imai, Tetsuro, Okumura, Yukihiko

“…Recently, mobile networks employing high-speed high-capacity communications have been investigated extensively to satisfy the demand for the faster and larger…”
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Fast algorithm for indoor microcell area prediction system using ray-tracing method by Imai, Tetsuro, Fujii, Teruya

“…In mobile communication systems such as cordless telephones, it is extremely important to understand the service area if the base station is placed indoors…”
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Cellular search performance of a W-CDMA cellular system using diversity by Imai, Tetsuro, Mori, Shinichi

“…Broadband DS‐CDMA (W‐CDMA) has been adopted as the wireless access scheme for the next‐generation mobile communication system IMT‐2000. Since the scheme is…”
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Time-Varying Path-Shadowing Model for Indoor Populated Environments by Kashiwagi, I., Taga, T., Imai, T.

“…This paper presents a path-shadowing model for indoor populated environments that has been developed based on computer simulations. The propagation paths…”
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Delay profile measurement system using common pilot channel for W-CDMA cellular system by Imai, Tetsuro, Mori, Shinichi

“…The communication quality in Wideband Code Division Multiple Access (W‐CDMA) is improved by temporally separating the arriving multipaths and combining them by…”
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