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Service Providers >> Satellite Internet - India, Asia and Australia >> Conversion Mbps to Msps https://www.satsig.net/cgi-bin/yabb/YaBB.pl?num=1255518511 Message started by Tagor Muda Dalimunthe on Oct 14th, 2009 at 12:08pm |
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Title: Conversion Mbps to Msps Post by Tagor Muda Dalimunthe on Oct 14th, 2009 at 12:08pm
Dear all, how to calculate
Out bound 45 Mbps to .... Msps In bound 2 Mbps to ...Msps Assume ; Modulasi In bound 8 PSK, FEC 7/8 Modulasi out bound QPSK, FEC 1/2 Rgds Tagor Muda |
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Title: Re: Conversion Mbps to Msps Post by Eric Johnston on Oct 14th, 2009 at 12:59pm
SR = Symbol Rate
DR = Data Rate = the information rate. This is the same as the customer information rate if there is no framing, packet header, supervisory, conditional access or encryption overhead added to the data stream in the modem. DVB modems and IP packets add significant overheads. CR = FEC Code Rate. Eg. 5/16, 21/44, 1/2, 2/3, 3/4, 5/6, 7/8, 188/204, 0.95 m = modulation factor (transmission rate bits per symbol). BPSK=1, QPSK=2, 8PSK=3, 8QAM =3, 16QAM=4 etc Formula: SR = DR / (m x CR) Best regards, Eric. |
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