Question:

Signal to noise ratio formula???

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I need the signal to noise ratio formulas in:

DSB SSB AM FM.

please explain any component of the formulas if you can.

Thanks

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  1. Cant see that it makes any difference if it's AM, FM or SSB. Signal to noise is signal to noise i.e. a ratio.

    SNR = Psignal/Pnoise = (RMSsignal/RMSnoise)^2

    and to convert to Logs

    SNRdb=

    10log10(Psignal/Pnoise)=

    20log10(RMSsignal/RMSnoise)

    assuming the same impedances.

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