- 著者
- Ryo Kato Mamoru Okumura Eiji Okamoto
- 出版者
- The Institute of Electronics, Information and Communication Engineers
- 雑誌
- IEICE Communications Express (ISSN:21870136)
- 巻号頁・発行日
- vol.11, no.5, pp.189-194, 2022-05-01 (Released:2022-05-01)
- 参考文献数
- 6
In 5G vehicular communications, beamforming technologies for vehicles, which compensate for large propagation losses at high carrier frequencies, are being considered. However, because the deflected beamforming loss degrades the communication quality, an accurate beam tracking system that follows the movement of the vehicle is required. In conventional schemes using a periodic codebook, the main lobe often deviates from the direction of the base station owing to fast movement. Therefore, in this study, a scheme for adaptively generating beam candidates using beam selection logs and the steering angle of the vehicle is proposed. Numerical results show that the scheme has high accuracy.
- 著者
- Kenji YOKOI Katsumi WATANABE Ryo KATO Takashi KAWAI Tadashi SATO Takashi YAMAZAKI Hitoshi YAMAGATA
- 出版者
- Japan Society of Kansei Engineering
- 雑誌
- KANSEI Engineering International (ISSN:13451928)
- 巻号頁・発行日
- vol.6, no.2, pp.13-18, 2006 (Released:2010-06-28)
- 参考文献数
- 24
- 被引用文献数
- 3 5
In this study, we applied a gaze-contingent window method to measure the spatial distribution of visual attention while playing an action video game. The peripheral visual field of a player was restricted to an area around the gaze by masks with various spatial extents. The quantitative relationship between window size and game performance confirmed that superior players had a wider distribution of visual attention than inferior players. An additional analysis of eye movements showed that the mean length of saccadic eye movements (indicating an overt allocation of attention) of inferior players was comparable to that of superior players. These results suggest that the difference in game performance between inferior and superior players may be due to the qualitative difference in the efficiency of covert allocation of visual attention. The present study also indicates the applicability of the gazecontingent window method for the online evaluations of performance and learning during dynamic visual-motor tasks.