Under the rapid development of satellite communication systems and satellite navigation systems, there is an urgent need to combine the two together in order to achieve location-based services, etc. Despite the long relationship history of navigation and communication, the two satellite systems are basically independent of each other. As a result, terminal size tends to be relatively large, and...

XM radio service is an emerging satellite digital audio radio service suitable for automotive environment, it offers users high-quality radio programs with better signal coverage by adopting communication satellite broadcasting technology. In order to incorporate XM radio function into a digital car audio system based on the embedded system industry standard ITRON, we analyze both software and ...

The third and fourth generation personal communication systems (PCS) are going to be based on spread spectrum techniques. This article intends to show, that the signal structures used by these systems are very similar to the ones used by GPS and proposed European satellite navigation systems and can be used for the purpose of user localization. Various methods for determining the user position ...

In this paper, we evaluate the ergodic capacity analysis of an integrated satellite-terrestrial cooperative communication system under independent and non-identical shadowed Rician and Nakagamifading channels. Multiple cooperative relay nodes are assumed between satellite and the destination node. Amplify-andforward (AF) cooperative protocol is used at each fixed relay node for signal amplifica...

Today’s and future communication systems in maritime rely on digital data communication between the ship and transceivers that are either on land, in air (satellite) or on sea. Analog voice communications is not an integrated part of future maritime communication system proposals. However, it is in general preserved in its functionality according to future maritime communication system proposal...

In the near future low earth orbit (LEO) satellite communication networks will partially substitute for fixed terrestrial multimedia networks especially in sparsely populated areas. Unlike fixed terrestrial networks, ongoing calls may be dropped if satellite channels are shadowed. Therefore, in most LEO satellite communication networks more than one satellite need to be simultaneously visible i...

This study presents the “overview of TCP performance on satellite communication networks”, aimed at satellite characteristics, their effects on throughput selected link control protocols and various method proposed for enhancing TCP throughput on satellite networks. Literature reviews on satellite link characteristics and their effects on TCP operation in satellite communication networks. Diffe...

A mobile-satellite system can utilize a wide variety of channels in order to provide services that fulfil various communication needs of aircraft, ship or land mobile earth stations. Network control data, facsimile, video and voice communications channels may be provided. The performance and link characteristics associated with these channels may differ and consequently, the tolerance of each c...

Satellite communication is well known in providing best services where broadcasting is essential, where terrain is hostile and very sparsely populated. It also has niche where rapid deployment is very critical and important. In Global Network Infrastructure satellite is considered as an inseparable component of the communication infrastructure. A variety of research work has been explored and p...