Abstract
In space information networks, the performance of the satellite-terrestrial links is crucial for downlink data delivery. Due to their relatively wide bandwidth, the use of mmWave (millimeter wave) signals is promising to enhance satellite communications. Adopting on-board antenna arrays can mitigate the attenuation associated with mmWave signals, and can also enable multi-beam transmissions. However, the number of RF (Radio Frequency) chains is usually limited in practical applications, which makes it extremely difficult to properly schedule users. In general, this scheduling problem is NP-hard. In this paper, we propose two scheduling algorithms that can be used to solve this problem with relatively low computational complexity. Intuitively, the correlated users are separated by the proposed schemes, which implies that the spatial diversity gain of multiple beams can be exploited. Simulation results show that the proposed algorithms can achieve nearly optimal performance in terms of the achievable sum rate of the system.
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This work is supported by the National Natural Science Foundation of China (Nos.61132002, 61321061).
ZHOU Zhengyi was bom in Hubei, China. He received a B.E. degree in electronic engineering from Tsinghua University, China, and is now a Ph.D. candidate in communications and information systems at Tsinghua University. His research interests include MIMO, precoding, and antenna systems and techniques. (Email: zhouzhengyi@126.com)
CHEN Yunfei received his B.E. and M.E. degrees in electronics engineering from Shanghai Jiao Tong University, Shanghai, China, in 1998 and 2001, respectively. He received his Ph.D. degree from the University of Alberta in 2006. He is currently working as an associate professor at the University of Warwick, U.K.. His research interests include wireless communications, cognitive radios, wireless relaying and energy harvesting.
FENG Wei was bom in Inner Mongolia, China. He received his B.S. and Ph.D. degrees in electronic engineering from Tsinghua University, China, and is now an assistant professor of electronic engineering at Tsinghua University. His research interests include distributed MIMO systems, coordinated resource allocation for wireless networks, and antenna array techniques for deep space communications. (Email: fengwei@tsinghua.edu.cn)
GE Ning [corresponding author] was bom in Xi’an, China. He received his B.S. and Ph.D. degrees in electronic engineering from Tsinghua University, China, and is now a professor of electronic engineering at Tsinghua University. His research interests include communication ASIC design, short range wireless communications, and wireless communications. (Email: gerang@tsinghua.edu.cn)
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Zhou, Z., Feng, W., Chen, Y. et al. Adaptive scheduling for millimeter wave multi-beam satellite communication systems. J. Commun. Inf. Netw. 1, 42–50 (2016). https://doi.org/10.1007/BF03391569
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DOI: https://doi.org/10.1007/BF03391569