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satellite communication

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nbl

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which type of modulation is used in satellite communication ? and why?
 

digital modulation like QPSK ,GMSK are used. with different coding rate 1/2,3/4 based on BER..etc are used..

one of the reason might be very less SNR of signals to be processed.
 

Satellite communication needs highly accurate transmission of data and is highly untolerable to errors. So the modulation scheme must have very less Bit Error Rate
 

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