In this paper satellite wave propagation at Ku and Ka band is considered. The design and simulation of a typical satellite beacon receiver at Ka band is designed and simulated for the future works. Also rain attenuation prediction at Ku band using satellite signal beacon measurement and simulations for Iran Telecommunication Research Center (ITRC) are presented. The measurement setup consists o...

| We propose a new framework for the link assignment (i.e., topological design) problem that arises from the use of inter-satellite links (ISL's) in Low-Earth Orbit (LEO) satellite networks. In the proposed framework, we model a LEO satellite network as a Finite State Automaton (FSA) where each state corresponds to an equal-length interval in the system period of the LEO satellite network. This...

Frequencies above 10 GHz are of primary importance in current satellite systems. In this paper, an analytical model is presented for the prediction of the adjacent satellite interference, cross-polarization and ice depolarization effects on channel capacity statistics of a dual polarized satellite link. As source of the aggravation of the adjacent satellite interference is considered here the p...

The idea of Internet everywhere makes the assumption that an Internet access should be available even in remote areas without network infrastructure. In this case satellite access represents an attractive solution. Nevertheless, experience shows that over satellite links, TCP is limited in terms of data speeds. Many enhancements and solutions, based for instance on tuning TCP parameters or TCP ...

This paper presents the initial results of a study activity intended to assess possible interference mitigation techniques applicable to broadband multimedia satellite systems. A multi-star network architecture based on a multi-beam transparent satellite is considered, and application of interference mitigation to both Forward Link and Reverse Link is discussed. Proposed techniques are however ...

The return link performance of conventional civil DVB-RCS transmission technology limits its direct application to air-borne satellite video transmission system. This paper studies the novel emergent DVB-RCS return link technique based on introducing adaptive parallel processing to the conventional civil DVB-RCS return link. Simulation results demonstrate that the proposed return link transmiss...

Since a satellite link provided by GEO (Geostationary Earth Orbit) Satellites has a large propagation delay, TCP performance is known to be degraded when the TCP connection is utilized between sender and receiver hosts interconnected via the satellite link. It is mainly because the window size of the TCP connection increases slowly due to the large propagation delay on the satellite link, and b...

This paper describes the use of a transparent TCP gateway to improve the performance of applications operating in a shared secure satellite environment. Typically, a satellite gateway is installed at each end of the satellite link, and the gateways process all traffic traversing the link. With the proliferation of virtual private network (VPN) technologies, multiple encrypted tunnels can be est...