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In this paper, the quality of service (QoS) metrics and user demand model are established in high altitude platforms (HAPs) broadband communication network. A methodology of mobile base station placement is proposed with QoS and user demand guarantee for the first time. Besides, the HAPs placement optimization framework is established by optimizing the(More)
Distributed satellite cluster network can provide a flexible space scenario with guaranteed quality of service (QoS) by making different kinds of satellites to accomplish missions collaboratively. In such a multi-satellite heterogeneous system, reasonable power control scheme can effectively improve the system performance. This paper analyzes the(More)
In this paper, an investigation into the topology structure design and performance analysis the distributed satellite cluster network (DSCN) in space information networks (SINs) at geosynchronous orbit (GEO) is presented. Use of concepts of domains, strong/weak link, hubs, small world, and degree realizability by employing Network Science Theory is examined(More)
The high altitude platform (HAP) is an important communication platform for cloud storage in the next generation internet. The Multiple-input multiple-output (MIMO) techniques provide the significant diversity and multiplexing gain, which can improve the network performance effectively. In this paper, a virtual MIMO model is proposed by networking the(More)
Pituitary tumor is an intracranial tumor; because of the development of neuroimaging technology in recent years, morbidity is likely to increase. Evidence showed impaired cognitive ability of patients with pituitary adenoma. There is evidence that neurobehavioral disorders are common in pituitary adenoma patients. This disorder is because of the cognitive(More)
Multibeam satellite communication systems (MSC-Ss) have been applied to provide efficiently power and bandwidth utilization for broadband service by employing frequency reuse. However, bandwidth for each beam is divied by frequency reuse which is used to mitigate the adjacent beam interference. Recently researchers resorted precoding as a novel interference(More)
This paper investigates the performance of integrated wireless sensor and multibeam satellite networks (IWSMSNs) under terrestrial interference. The IWSMSNs constitute sensor nodes (SNs), satellite sinks (SSs), multibeam satellite and remote monitoring hosts (RMHs). The multibeam satellite covers multiple beams and multiple SSs in each beam. The SSs can be(More)
This paper considers the performance of the return link for the hybrid satellite terrestrial communication systems (HSTCSs) under the terrestrial interference. The hybrid beam models are proposed by considering the equivalent inter-beam interference factor α from adjacent beams and the intra-beam equivalent interference factor β from the(More)