Plot adaptive filter coefficients

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Cory Larsen 2014-10-10

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/158195-plot-adaptive-filter-coefficients

评论： Puneet Rana 2014-11-10

Hello,

I would like to plot the time series of the coefficients from an adaptive filter object, in order to watch the convergence of my filter coefficients. How can I do this?

For example, using the example provided at the bottom of http://www.mathworks.com/help/dsp/ref/adaptfilt.html

How do I plot the time series of filter coefficients for each step, rather than just the final values?

Thanks

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Answer 1

Puneet Rana 2014-10-30

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https://ww2.mathworks.cn/matlabcentral/answers/158195-plot-adaptive-filter-coefficients#answer_157174

There are a lot of ways to achieve this:

Use XY Graph for convergence: http://www.mathworks.com/help/dsp/examples/adaptive-filter-convergence.html
Use Waterfall Scope for 3-D representation: http://www.mathworks.com/help/dsp/examples/acoustic-noise-cancellation-lms.html
Use Time Scope for learning curve of filter: http://www.mathworks.com/help/dsp/examples/system-identification-using-rls-adaptive-filtering.html

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Cory Larsen 2014-11-6

So I have to use simulink to do this, I cannot do it in code? I can generate the learning curves based off the filter error returned, but I cannot determine how to plot the time series of the coefficients.

Thanks

Puneet Rana 2014-11-10

Coefficients are vectors at every time step. Do you mean you want to have a 3-D plot that shows progressive change of the values of that vector across time?

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