Search Results - "Tran, Ngochao"

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 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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Beamforming gain degradation of array anntena at 20-GHz band in urban street canyon by Tran, Ngochao, Imai, Tetsuro, Kitao, Koshiro, Okumura, Yukihiko

“…In the 5G system, high frequency bands over 6 GHz (6-100 GHz) will be a key factor in providing a very wide bandwidth. To compensate for high propagation loss…”
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Time-variant channel characteristics at 20-GHz band in urban street canyon environment by Ngochao Tran, Imai, Tetsuro, Kitao, Koshiro, Okumura, Yukihiko

“…This paper presents time-variant channel characteristics at the 20-GHz band for line of sight (LoS) scenarios in an urban street canyon environment. A…”
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Design of multi-beam reflectarray using mushroom-like structure by Maruyama, Tamami, Jiyun Shen, Ngochao Tran, Oda, Yasuhiro

“…Improving the propagation environment using a reflectarray has recently been proposed to eliminate blind zones or to improve the capacity of line of sight…”
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Measurement of reflectarray for improving MIMO channel capacity of outdoor NLOS radio channel by Qiang Chen, Jianfeng Li, Kurihara, Yusuke, Sawaya, Kunio, Qiaowei Yuan, Ngochao Tran, Oda, Yasuhiro

“…Reflectarray is used as a passive reflector for improving outdoor radio channel in none-line-of-sight (NLOS) environment. The proposed reflectarray is designed…”
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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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Multi-band reflectarray using mushroom structure by Maruyama, T., Jiyun Shen, Ngochao Tran, Oda, Y.

“…This paper shows a study of the multiband mushroom reflectarray design. We have achieved multi-band reflectarray to satisfy desired reflection phase, using TE…”
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Channel improvement for line-of-sight MIMO using dual-beam reflectarray by Jiyun Shen, Oda, Y., Maruyama, T., Ngochao Tran, Kayama, H.

“…Multiple-input multiple-output (MIMO) transmission schemes with a high radio frequency are expected to make ultra high-rate mobile communications practical due…”
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Experimental investigation of elimination blindness propagation channel using reflectarray by Qiang Chen, Jianfeng Li, Kurihara, Y., Kuan-Hua Chen, Sawaya, K., Qiaowei Yuan, Tran, N., Oda, Y.

“…A 42 × 44-element reflectarray using interdigital gap loading structure element is used as a passive reflector for elimination blindness propagation channel…”
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Design of wide angle reflection reflectarray using multi-layer mushroom structure to improve propagation by Maruyama, T., Furuno, T., Oda, Y., Jiyun Shen, Ngochao Tran, Kayama, H.

“…This paper proposes a multi-layer mushroom reflectarray to achieve a wide angle of reflection (AOR) reflectarray at a super high frequency that can be used to…”
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Outdoor-to-indoor channel characteristics at 20 GHz by Ngochao Tran, Imai, Tetsuro, Okumura, Yukihiko

“…The next generation (5G) mobile communication system has been the focus of studies recently. One of the approaches to enable this system is utilizing the…”
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Study on Outdoor-to-Indoor channel characteristics at 20 GHz bands by Imai, Tetsuro, Tran, Ngochao, Okumura, Yukihiko

“…The next generation (5G) mobile communication system has been the focus of studies recently. One of the approaches to enable this system is utilizing the…”
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A study on wall scattering characteristics based on ER model with point cloud data by Tran, Ngochao, Imai, Tetsuro, Kitao, Koshiro, Okumura, Yukihiko

“…In high frequency bands over 6 GHz (6-100 GHz), the scattering properties of radio waves due to the roughness of building walls are considered to be different…”
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Measurement of indoor channel characteristics at 20 GHz band by Tran, Ngochao, Imai, Tetsuro, Okumura, Yukihiko

“…A high frequency (over 6 GHz) band 5G system with a very high data transmission rate has been the focus of studies recently. One important issue to enable this…”
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Frequency characteristics of changes in received levels by human body blockage in indoor environment by Kitao, Koshiro, Tran, Ngochao, Imai, Tetsuro, Okumura, Yukihiko

“…For fifth generation mobile communication systems (5G) utilization of band from 6 to 100 GHz are investigated to increase the system capacity, because ensuring…”
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Study on propagation characteristics in SHF (over 6 GHz) bands by Tran, Ngochao, Imai, Tetsuro, Okumura, Yukihiko

“…In order to apply super high frequency (SHF) bands to small cells, we clarify basic propagation characteristics and shadowing loss due to human body shadowing…”
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Study on propagation channel characteristics at 20-GHz band for outdoor small cell by Tran, Ngochao, Imai, Tetsuro, Kitao, Koshiro, Okumura, Yukihiko, Taniguchi, Ryotaro, Nishimori, Kentaro

“…In the 5G system, high frequency bands over 6 GHz (6-100 GHz) will be a key factor in providing a very wide bandwidth. Because of high path losses, these bands…”
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Comparison of indoor penetration loss between measurement result and hybrid method by ray-tracing and physical optics by Kimoto, Hayate, Nishimori, Kentaro, Imai, Tetsuro, Omaki, Nobutaka, Tran, Ngochao

“…This paper investigates an indoor penetration loss between measured result and the result by a hybrid method of ray-tracing (RT) and physical optics (PO)…”
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