نتایج جستجو برای: satellite communication system
تعداد نتایج: 2527354 فیلتر نتایج به سال:
This paper evaluates the performance of Satellite communication system. Different data modulation techniques are tested and analyzed to select the optimum modulation scheme. Different channels as AWGN, Rayleigh and Rician channel models are implemented and evaluated with various channel estimation techniques as, Least Square (LS), Least Square-Modified (LS-Mod) and Minimum Mean Square Error (MM...
a significant problem in multicarrier communication systems is the necessity to reduce the value of papr (peak-to-average power ratio) of transmitting signal. in this thesis we study the effect of the system parameters such as coding and modulation types on papr and ultimate ber in a mc-cdma system. in this study we consider fading channel as well as the nonlinearity of transmitter’s amplifier ...
In this paper, we propose a verification method for risk management system of the electric power grid (RMS-EPG) using satellite communication network. The RMS-EPG with satellite communication network should be verified with various contingencies for its design and maintenance. For the verification of RMS-PG, the proposed system composed of the satellite communication simulator and the Power flo...
An efficient resource allocation is important to guarantee the best performance with a fair distribution of multi-beam satellite capacity to provide satellite multimedia and broadcasting services. In this way, available bandwidth and capacity problems in new satellite system likes Multi-Input-Multi-Output (MIMO), exploring new techniques for enhancing spectral efficiency in satellite communicat...
This article presents the design and development of a satellite cluster system that supports an in-terfederation communication in High Level Architecture (HLA)–compliant distributed simulation. The interfederation communication enables the execution of a complex, large-scale cluster system of distributed satellites that share the dispersed data assets among satellite components collaboratively....
In this paper, Electromagnetic capability (EMC) has substantial role in projects with electromagnetic properties. In this paper, EMC in transponder payload for communication satellite is evaluated. EMC problems are assessed in two levels, system and subsystem level. Charging, grounding and bonding are studied about system level. In general, subsystem tests involve radiated emission, condu...
The U.S. Air Force (USAF) proposes to launch six Milstar Satellites from Cape Canaveral Air Force Station (CCAFS), Florida, using a Titan IV launch vehicle with a Centaur upper stage (Titan IV/Centaur). The primary mission of Milstar is to provide the next generation of Military Satellite Communication (MILSATCOM) systems to complement Navy’s Fleet Satellite Communication System, Air Force’s Sa...
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