GRC Filter Taps read from file. (3.8.2.0 - from source)

[David Taylor (manx.net)]

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