Extending quantum communication to Space environments would enable to perform fundamental experiments on quantum physics as well as applications of quantum information at planetary and interplanetary scales. Here, we report the first experimental implementation of a scheme for single-photon exchange between a satellite and an Earth-based station. We built an experiment that mimics a single phot...

In the paper various issues in personal satellite communications are addressed. Basic geostationary and non-geostationary satellite constellations are considered. The narrowband and wideband characterization of the mobile satellite channel and related system implications are discussed. Satellite diversity is presented as a measure to overcome signal shadowing. The capacity of TDMA and CDMA mult...

Lower cost: The cost of disposing FSO is lower than that of an RF with comparable data rate. There are no cables to deploy, no expensive rooftop installations required. Based on a recent finding done by an FSO company based in Canada 'fSONA', the cost per Mbps per month based on FSO is about half that of RF based systems [1]. Huge modulation bandwidth: Generally Optical carrier wavelength which...

This paper deals with the new progressive channel coding methods for short message transmission via satellite transponder using predetermined length of frame. The key benefits of this contribution are modification and implementation of a new turbo code and utilization of unique features with applications of methods for bit error rate estimation and algorithm for output message reconstruction. T...

This paper addresses the problem of efficient forward error correction on differentially encoded, quadriphase-shift-keying (DQPSK) channels. The approach is to design codes to correct the most probable error patterns. First the probability distribution of error patterns is derived. Then a class of convolutional codes that correct any single two-bit error is described. Finally a threshold decoda...

This three-day course is designed for satellite communications engineers, spacecraft engineers, and managers who want to obtain an understanding of the “big picture” of satellite communications. Each topic is illustrated by detailed worked numerical examples, using published data for actual satellite communications systems. The course is technically oriented and includes mathematical derivation...

Satellite Communication Systems are beneficial in providing communication services to vast regions especially where the adequate infrastructure for communication may not be constructed. Wireless communication is one of the fastest growing fields in the engineering world. Introduction on adaptive antenna array is described in this paper. Linear adaptive algorithm LMS (Least mean square) is used ...

This paper presents a simple model for the evaluation of obstruction caused by multiple buildings in satellite mobile communication systems, or in high-altitude platform (HAP) coverage. The proposed model can be useful for integration into propagation prediction tools. It is based on the KichhoffHuygens formulation, and includes the effect of ground reflections and reflections on a facing build...

This paper analyzes the character and performance of the synthesized test bed on ground of small satellites. By studying several small satellite systems, the hardware and software architectures of flexible test bed are presented. The communication request/reply relations as well as other communication parameter's dynamic configuration, TM data format's dynamic description, TM signal's automatic...

Research and development activities have been implemented for the Satellite/Terrestrial Integrated Mobile Communication System (STICS) that enables mobile phones to seamlessly switch terrestrial communication links/satellite communication links. In STICS, through taking advantage of a large-antenna multi-beam satellite communication system, the satellite/terrestrial communications links are sup...