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From: | David Taylor (manx.net) |
Subject: | GRC Filter Taps read from file. (3.8.2.0 - from source) |
Date: | Wed, 16 Sep 2020 18:10:36 +0100 |
Hi,
I am trying to import a large number of taps (1023) into a Decimating FIR
Filter, in order to repeat (as reference), a GRC experiment that was published
about four years ago.
The taps import method used at the time was numpy.genfromtxt(),
that much is clear.
I have tried using numpy.fromfile, numpy.genfromtxt and others in the Filter block itself
without success and have been looking for possible examples of file import use
in the 3.8.2.0 installed /example folders and elsewhere.
The filter taps do however populate directly from a GRC variable python
list as real(floats), [1,1, –1, 1,1 ....]
Firdes is operable and the python wrappers for filter design populate the
taps in much the same way.
The coefficient values are externally generated complex floats, but can be
easily converted into other numeric or delimited text formats, as BPSK coding is
being used. This much has been tried.
On a completely unrelated matter, I hope, the Filter Design Tool is
inoperative.
I apologise if this is covering old ground again.
Regards,
David GD4FMB |
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