Signal to Noise Ratio Formula Needed.
in [DSP]
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From: Alex on 22 Jun 2008 17:04 Hi, given a known data rate in kbps and a known signal to noise ratio how do you calculate the minimum bandwith? thanks Alex
From: Jerry Avins on 22 Jun 2008 17:34 Alex wrote: > Hi, > > given a known data rate in kbps and a known signal to noise ratio how > do you calculate the minimum bandwith? > > thanks > > Alex What bit-error rate can you tolerate? Jerry -- Engineering is the art of making what you want from things you can get. �����������������������������������������������������������������������
From: Randy Yates on 22 Jun 2008 17:52 Alex <alex.colic(a)rbc.com> writes: > Hi, > > given a known data rate in kbps and a known signal to noise ratio how > do you calculate the minimum bandwith? Hi Alex, That's the classic Shannon theorem. R = W * log_2(1 + P / N) So just solve for W. This is the ideal. You'll have to back off from that to account for implementation losses, and will in practice only be good for a certain BER. -- % Randy Yates % "The dreamer, the unwoken fool - %% Fuquay-Varina, NC % in dreams, no pain will kiss the brow..." %%% 919-577-9882 % %%%% <yates(a)ieee.org> % 'Eldorado Overture', *Eldorado*, ELO http://www.digitalsignallabs.com
From: cpshah99 on 23 Jun 2008 11:08 >Alex <alex.colic(a)rbc.com> writes: > >> Hi, >> >> given a known data rate in kbps and a known signal to noise ratio how >> do you calculate the minimum bandwith? > >Hi Alex, > >That's the classic Shannon theorem. > > R = W * log_2(1 + P / N) > >So just solve for W. This is the ideal. You'll have to back off from >that to account for implementation losses, and will in practice only >be good for a certain BER. >-- >% Randy Yates % "The dreamer, the unwoken fool - >%% Fuquay-Varina, NC % in dreams, no pain will kiss the brow..." >%%% 919-577-9882 % >%%%% <yates(a)ieee.org> % 'Eldorado Overture', *Eldorado*, ELO >http://www.digitalsignallabs.com > %%%% Hello Can somebody please clear my doubt on this topic? Does the SNR value differ at baseband and bandpass? I have been struggling to add noise at baseband. In matlab the relationship is given to take into account oversampling. I do not know why we do that? Your answer and help will be greatly appreciated. Chintan
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