Over the past few years I worked on the data acquisition system that can acquire biomedical signals. I am interested to learn how to process sampled data in order to obtain proper signal parameters such are frequency spectrum components, RMS in case of non-coherent sampling etc. My knowledge includes: Routing and desinigning PCB and circuit schematics for mixed signal systems where separating analog and digital ground in proper way is esential for good ADC performance. Advanced microcontroller programming skills (NXP and Microchip) basic signal processing theorems(Nyquist) needed for proper analog filter design

Hi Mr. Dan,Whole goal is to robustly suppress noise while maintaining smooth response.Yes that can be the solution. Quantization steps/thresholds as I made this...
Hi Mr. Dan,Yes I see your point. However this looks like it was modeled with EWMA or first order iir. The way it is done is non-linear for sure. Reason why was to...
Hi Mr. Lyons,I will try to explain. I used fixed 0.04 quantization stepsSo at first if (abs(x[n] - y[n-1])) < 0.02 step = 0 (just in first case 0.02 is used)else...
Hi Mr. Artmez,Yes it is correct. This is like a weighted filter. You may see how usual simple first order IIR output response compares with this differenced IIR....
I have all math capabilities and there is no problem of doing it in double precision.All that I am concerned with is weather my filter is stable? I divided the difference...
alfa = 1.991635132e-4.Correct alfa is way below 1.‬
Well these are questions that I would like to learn. Real world examples of when this kind of processing is used.alfa term is just a constant forgetting rate. It...
Hi,I am dealing with the first order iir filter. Formula is y[n] = y[n-1] + alfa*(x[n] - y[n-1]). x[n] is new input sample while y[n] is the output. I quantized...

Re: damping filter - finite stationary error

Reply posted 7 months ago (11/30/2019)
Ok I can accept that system is non-linear and that there is some kind of limiter. But the question is how to implement that? I am not interested in some simple ad-hoc...

Re: damping filter - finite stationary error

Reply posted 7 months ago (11/27/2019)
And how to obtain desired_signal max? I don't have that information. All I have is the input signal from input.txt. That is why I told you it can be achieved with...

Re: damping filter - finite stationary error

Reply posted 7 months ago (11/27/2019)
There is moving average if you take a look at the provided code. Limiter does not sound good.

Re: damping filter - finite stationary error

Reply posted 7 months ago (11/27/2019)
Details are provided.

Re: damping filter - finite stationary error

Reply posted 7 months ago (11/27/2019)
Details are provided now. Sorry for the first post that did not include them.

Re: damping filter - finite stationary error

Reply posted 7 months ago (11/27/2019)
How?

damping filter - finite stationary error

New thread started 7 months ago
Hi,I need to make a damping filter that will produce for the given input signal desired output.  In the desired output there is always some stationary error that...

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