George Nychis wrote:
I had thought I could use gr_fir_filter_ccc, setting my taps to be the
time reversed version of the input signal, but found that it wasn't
correlating. I think what I was missing is the fact you are suggesting
that the taps be the complex conjugate of the input signal?
You are apparently correct :)
Using the FIR with time reversed complex conjugate of the desired input
signal:
http://cyprus.cmcl.cs.cmu.edu/matched_filter/graphs/mf_fir_conjugate.jpg
Using the "matched filter block" that uses the complex/real-wise inner
product:
http://cyprus.cmcl.cs.cmu.edu/matched_filter/graphs/mf_block.jpg
The FIR filter method seems to have much better properties, creating a
much larger magnitude in the output.
- George
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