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Is it possible to use complex coefficients with the FIR Compiler II? If so, what notation is used to specify this when loading coefficients from a file into the wizard? I've tried i and j, but the wizard is complaining about invalid coefficients.
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I know dspbuilder doesn't support complex filter but you can use four real filters and do the complex addition/subtraction manually.
remember for every tap the following multiplication is needed:
yr =
xr.hr - xi.hi
yi = xr.hi +
xi.hr thus the terms
xr.hr becomes one filter for these inputs and the term xi.hi a second filter and so on. Finally you add/subtract the outputs of two pair filters to get real and imag output.
You can alsouse three filters by some trick.
