Beam biasing based interference mitigation scheme in millimeter wave satellite cluster with multi-beam receiving
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Beam biasing based interference mitigation scheme in millimeter wave satellite cluster with multi‑beam receiving Wen Zhang1 · Shanghong Zhang1 · Gaofeng Cui1 · Weidong Wang1
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The directional transmission of millimeter wave (mmWave) beam is applied in the satellite cluster, which can efficiently avoid the interference problem caused by the satellites working in the same frequency band. However, due to the dynamic change of the satellite cluster topology and the randomness of the message transmitted by satellite, there will still be interference. In this paper, in terms of beam domain, beam biasing is proposed as an interference mitigation scheme to maximize the achievable rate of the network. Specifically, in the view of resource management, enhanced genetic algorithms is applied to search for the optimal beam bias angle of every beam in mmWave with multi-beam receiving senior. Simulation results show that the proposed schemes can significantly improve the achievable rate compared with the conventional multi-beam receiving scheme for mmWave communication. Keywords mmWave · Satellite cluster · Multi-beam · Beam biasing · GA
1 Introduction With the rapid development of space technology, the future satellite network has urgent requirements for satellite processing, storage and computing capabilities. To meet these needs, the development of satellites cluster is receiving great attention from the space industry [1]. The satellite cluster that integrates micro-satellite techniques, sensor techniques and wireless communication techniques can cooperate with each other to complete high complex missions [2]. Compared with the traditional single large satellite, the satellite cluster has the advantages of rapid development, lower cost and more flexibility, that make satellite cluster are becoming a better option for on-orbit task reconfiguration [3, 4]. Especially in user—intensive areas, satellite cluster can enhance coverage of the area through scheduling, and enables a whole new class of missions for remote sensing, communications and scientific research [5]. So the satellite cluster can reflect its value in situations such as limited resources and limited satellite loads platform. At present, some programs being launched such as Cartwheel [6], TechSat21 * Wen Zhang [email protected] 1
Beijing University of Posts and Telecommunications, Beijing, China
[7], OLFAR [8]. The satellite cluster is the simplest form of distributed satellite systems, there is no need for additional inter-satellite closed-circuit control or orbital operations during operation. However, some disadvantages also arise, such as the interference problem studied in this paper. Hence, building satellite cluster, and establishing efficient and reliable inter-satellite link become the popular research hotspots, especially for satellite cluster operating in the millimeter wave (mmWave) band [9]. mmWave communication has been postulated as one of the most disruptive technologi
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