TAILIEUCHUNG - Channel capacity of high altitude platform systems: A case study

This paper presents a model for Multiple-Input Multiple-Output (MIMO) Land High Altitude Platform channels and analytical evaluation of Discrete-input Continuousoutput Memoryless Channel capacity for High Altitude Platform (HAP)–MIMO systems, where practical transmission environments are considered. | Research and Development on Information and Communication Technology Channel Capacity of High Altitude Platform Systems: A Case Study Nguyen Thu Hien, Vu Van San and Nguyen Viet Hung Posts and Telecommunications Institute of Technology, Vietnam E-mail: hiennt@, vanvv@, hungnv@ Correspondence: Nguyen Thu Hien Communication: received 1 August 2017, revised 22 September 2017, accepted 25 September 2017 infrastructure [4]. In 2014, two large companies, Google and Facebook, announced their investments in HAP related projects, aiming to provide internet access in the regions where communications infrastructures based on terrestrial or satellite transmissions are not available [5]. MultipleInput Multiple-Output (MIMO) transmission promises a significant increase in the system capacity and availability of communication links in a multipath propagation environment. It is an extension of diversity principles often applied in wireless links to improve link reliability. Combining the transmit and receive diversity results in a new concept, which not only increases the link reliability but also offers a potential increase for the radio link capacity. The challenge nowadays is to investigate the application of MIMO techniques to the Land High Altitude Platform (LHAP) communication. Some models using multiple HAP constellations have shown that capacity can be significantly increased by using highly directional user antennas to spatially discriminate between HAPs in different parts of sky [6]. Abstract: This paper presents a model for Multiple-Input Multiple-Output (MIMO) Land High Altitude Platform channels and analytical evaluation of Discrete-input Continuousoutput Memoryless Channel capacity for High Altitude Platform (HAP)–MIMO systems, where practical transmission environments are considered. Furthermore, for HAP– SingleInput Single-Output (SISO) systems, we propose an adaptive transmission mechanism relying on the transmit power .

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