Hd_custom_cheby2 = fdesign.lowpass('N,Fst,Ast', N, high_limit, A_stop, Fs);
custom = design(Hd_custom_cheby2, 'cheby2','SystemObject',true);
filteredData = step(custom, data);
John Williams answered . 2024-05-17 20:58:31
>>methods('gpuArray')
MATLAB filter System objects do not support gpuArray inputs, however they support C-code generation which can also be used to speed up processing time. You will need MATLAB Coder for this. You can use FDESIGN to design a filter System object with coefficients that meet the filter specifications and then generate C code to process data with this filter. Please take a look at this documentation link for more information on building filters through a GUI:
<https://www.matlabsolutions.com/documentation/signal-processing.php>
Using this GUI you can get MATLAB code for a function that filters data and that can be converted to C code using the CODEGEN command. The documentation for CODEGEN command is here:
<https://www.matlabsolutions.com/documentation/matlab-basics.php>
The FILTER function on the GPU does not support IIR filters. Only FIR filters are supported with no input or output state. If you are using an IIR filter, the best way is try to do the filtering in the frequency domain. You can use FFT and IFFT functions that are supported on the GPU to implement this.
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