Abstract
This article introduces a unified and detailed methodology for interference assessment between coexisting fixed satellite service (FSS) and broadcast satellite service (BSS) with spectrum sharing at the Ka-band. The interference analysis is presented along with a step-by-step algorithm for the calculation of the carrier-to-interference ratio (CIR). The proposed procedure takes into consideration the near-field effect of ground-satellite-terminal antennas since these may reside at very close distances. Furthermore, numerical results are delivered so as to assess the CIR in relation to the relative geometry and the technical characteristics of the satellite terminals. A real application scenario is also provided along with measurements so as to validate the recommended methodology. Finally, mitigation techniques are proposed for the protection of the victim stations and operation under harmful interference conditions.
Highlights
Satellite networks play a vital role in Internet connectivity on a global scale
The maximum carrier-to-interference ratio (CIR) is achieved for an elevation angle of 65◦
The general trend is that the local minimum of the CIR at the interferer side is reflected as a local maximum on the victim location, and vice versa, as the plots indicate in Figure 5. (The difference between these two points is about 28◦.) It is clearly attributed to the selected geometry, on the basis of Equations (7) and (8) and it is subjected to changes demonstrating a reversed tendency if φb,n > 180◦
Summary
Satellite networks play a vital role in Internet connectivity on a global scale. There has been a global expansion of satellite services during the few last years with the establishment of many satellite terminals and new satellite teleports by stakeholders [1]. Due to the inherent nature of the satellite systems to provide coverage in wide areas and especially to remote areas, their integration with 5G will support various scenarios, such as enhanced mobile broadband, massive machine-type communications, and ultra-reliable and low-latency communications [2]. This enormous increase of bandwidth-demanding services forced the satellite providers to improve space-segment performance, enhancing the link capacity. Upon the establishment of new satellite terminals (e.g., in teleports) with spectrum sharing in the Ka-band, it is of high priority to assess the potential ground-path interference and, in the case of occurrence, propose any available mitigation countermeasures. In the case of spectrum sharing between FSS and BSS within a teleport administration at very close distances, these methods are not applicable
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