Sampling Only When SNR Is Above Some Limit
in [Basics]
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From: Bret Cahill on 3 Aug 2010 12:45 In some situations the time periods when noise will be an issue are easy to identify. Instead of subtracting or filtering the noise you use a comparator to simply shut down the noisy signal until the SNR improves. This basic approach is possible analogue as well as digital. What is the name of this method or some key words to get started? Bret Cahill
From: whit3rd on 3 Aug 2010 18:44 On Aug 3, 9:45 am, Bret Cahill <BretCah...(a)peoplepc.com> wrote: > In some situations the time periods when noise will be an issue are > easy to identify. [so, don't measure then] > What is > the name of this method or some key words to get started? In the mathematical sense, this is 'statistical weight' in operation. In signal processing, 'squelch' and 'noise gate' are appropriate terms.
From: Joerg on 3 Aug 2010 21:55 Bret Cahill wrote: > In some situations the time periods when noise will be an issue are > easy to identify. Instead of subtracting or filtering the noise you > use a comparator to simply shut down the noisy signal until the SNR > improves. > > This basic approach is possible analogue as well as digital. What is > the name of this method or some key words to get started? > You don't mean a "noise blanker" as they are called in the RF world? Technically they often work a bit different, they don't completely cut the signal. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
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