Satellite systems are designed as a backup system to the existing land based wireless systems. Because of the global coverage of the system it becomes more economic for the rural areas where there is no wired infrastructure of communication. Besides being more economic to the rural areas the satellite networks are not affected by the natural disasters and continue to give the service in such si...

The perceived robustness of multi-agent systems is claimed to be one of the great benefits of distributed control, but centralised control dominates in space applications. We propose the use of marketbased control to allocate tasks in a distributed satellite system. The use of an artificial currency allows us to take the capabilities, energy levels and location of individual satellites, as well...

SIRIO is one of the three Operations Studies included in the framework of the ESA Iris Programme, which aims to design and develop a new Satellite Communication system for Air Traffic Management. SIRIO focus is on the definition of a Service Model and Business Model for the provision of ATS and AOC communication services via satellite. The definition activity is based on the analysis of the ATM...

The sharing of C-band between microwave terrestrial and satellite communication systems invariably introduces interference from one system into the other. Such co-channel interference becomes even more important in satellite receive stations with smaller antennas and must be minimized to achieve system performance objectives. In this paper, co-channel interference due to two TD2 (FDM/FM) carrie...

This paper proposes the use of quasi-stationary aircraft and reconfigurable intelligent surfaces (RIS) to improve system performance in satellite–terrestrial laser communication downlink. Single-input multiple-output (SIMO) technology is applied relay node a aircraft. The closed expression bit error rate (BER) an RIS-assisted satellite aircraft–terrestrial (RIS-SHTLC) derived under M-distribute...

Recent technological developments and new launch opportunities have allowed the development spread of small satellite missions for commercial educational purposes different applications. Among this category satellites, CubeSats attracted lots attention given their low design-and-deployment costs. Such satellites usually operate in narrow ranges UHF frequency band to perform communication activi...

In this letter, performance of a multiantenna multiuser unmanned aerial vehicle (UAV)-assisted terrestrial-satellite communication system over mixed free space optics (FSO)/radiofrequency (RF) channels is analyzed. Downlink transmission from the satellite to UAV completed through FSO link which follows gamma–gamma distribution with pointing error impairments. Both heterodyne detection an...

In this paper, a compact two-shape slot microstrip antenna is proposed for global positioning system (GPS) satellite application. The designed with FR 4 substrate height of 1.6 mm, dielectric constant εr 4.3 within size 56 x mm2 area. design parameters are optimized to achieve good performance. At the optimum setting parameters, shows characteristics cover L1 band 1,575.42 MHz, ± 12 MHz frequen...