Joint on-board resource sharing and hierarchical modulation scheme for satellite communication

2002 ◽  
Author(s):  
M. Morimoto ◽  
M. Okada ◽  
S. Komaki
Keyword(s):  
Resource Sharing ◽  
Satellite Communication ◽  
Modulation Scheme ◽  
Hierarchical Modulation

scholarly journals Satellite Communications. SDPSK Modulator for Radiation Tolerant Satellite Modem / SDPSK Modulators Radiācijas Noturīgam Satelīta Modēmam

2013 ◽  
Vol 50 (1) ◽  
pp. 76-83
Author(s):  
A. Skorodumovs
Keyword(s):  
Pulse Shaping ◽  
Satellite Communication ◽  
Satellite Communications ◽  
Data Rate ◽  
Modulation Scheme ◽  
Differential Phase Shift ◽  
Shaping Filter ◽  
Change Communication ◽  
Power Radiation ◽  
Radiation Tolerant

After a satellite has been launched, it is impossible to reprogram the hardware modulator. Therefore, a nanoRTU FPGA-based controller (AAC Microtec) in a modified modulation scheme may be programmed as a modem backend for softwaredefined radio (SDR) in the satellite communication system in order to adjust the balance of data rate vs. link reliability, enable coding or encryption system, change communication protocols, etc. For this purpose, a low-power radiation-tolerant reprogrammable satellite modem back-end has been realized for the satellite-to-Earth communication. This paper describes realization of a low data rate modulator based on a robust and reliable symmetric differential phase shift keying (SDPSK) modulation scheme combined with a raised cosine pulse shaping filter in nanoRTU, and presents results of its testing

scholarly journals MATLAB Simulation and HDL Implementation of DVB-S2 Modulator

2020 ◽  
Vol 9 (5) ◽  
pp. 698-701
Keyword(s):  
Digital Video ◽  
Satellite Communication ◽  
Modulation Scheme ◽  
Matlab Simulation ◽  
Description Language ◽  
Digital Video Broadcasting ◽  
Video Broadcasting ◽  
Hardware Description ◽  
Cost Efficient ◽  
Minimal Effort

Ongoing improvements in the region of satellite communication are making conceivable minimal effort information transmission and TV broadcasting to gently populated zones spread over a huge environmental district. As a result of direct and non-direct manner of satellite subsystems and station, audio and video transmissions through satellite transponders face corruption. These damages make an antagonistic impact on the end to end interface execution. This Project is centered around reproduction of the Digital Video Broadcasting – Satellite second era computerized TV transmission. For this simulation, an application in MATLAB is created. It tends to be utilized for re-enactment of entire preparation in DVB-S2 transmitter including stream adjustment, FEC coding with interleaving, modulation, channel damage & also opposite tasks in the receiver. The main aim of this model is to manage Digital Video Broadcasting – Satellite second era parameters using filter in different modulation scheme like QPSK, 8PSK, 16APSK and 32APSK, to get better roll off factor, with all the possible code rates, and use Hardware Description Language to prepare this model, since this way of implementation will make the model cost efficient and also enables the user for the customized code rates.

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