著者

Takanobu Watanabe Kentaro Nishimori Riku Okada

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.10, pp.619-624, 2022-10-01 (Released:2022-10-01)

参考文献数

6

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Recently, microwave and millimeter-wave bands have been considered for outdoor applications to cope with the emerging increase in communication traffic. However, a higher the frequency causes larger propagation losses. Consequently, a system that uses UAVs as relay stations to communicate in a line-of-sight (LoS) environment has been studied. In such a system, the numbers of transmitting and receiving antenna elements are different. In this study, we evaluate the performance of an asymmetric LoS-MIMO system with different number of antenna elements for transmission and reception. The effectiveness of the asymmetric LoS-MIMO system is demonstrated by comparing the channel capacity pertaining to the distance between the transmitter and receiver based on a conventional symmetric LoS-MIMO system with an equal number of antenna elements.