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Matched Filtering: Should I flip the input before convolving?

In general, one must "flip" and conjugate the waveform to be filtered to yield the matched filter. Related to this, there is some misunderstanding about viewing the convolution as flipping ...
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Matched Filtering: Should I flip the input before convolving?

Yes, in general you need the flip (though if your signal is symmetric it won't matter), and if your signals are complex you need to conjugate $q$ as well. The matched filter is the cross correlation ...
Gillespie's user avatar
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