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SNR of digital sensors

Started by Unknown October 30, 2016
When you have a digital sensor (say a quad detector for example), how do we estimate the SNR if we are using say a Kalman filter? My own guess is that it will be more or less deterministic baring quantisation noise.
On Sun, 30 Oct 2016 10:38:42 -0700, gyansorova wrote:

> When you have a digital sensor (say a quad detector for example), how do > we estimate the SNR if we are using say a Kalman filter? My own guess is > that it will be more or less deterministic baring quantisation noise.
Depends on the sensor, but -- maybe. Long and intense conversations with the sensor vendor are a good idea. With quadrature sensors, the first thing you want to know is whether the actual physical sensor has as many lines as the finished sensor is specified for. Even if the sensor itself is very deterministically measuring the position of one mechanical bit against another, when your resolution is very high you can't be sure that there won't be some process (usually mechanical vibration) that'll look a lot like noise to a Kalman filter. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com I'm looking for work -- see my website!