Availability of functionality

kfrlib / kfr

Fast, modern C++ DSP framework, FFT, Sample Rate Conversion, FIR/IIR/Biquad Filters (SSE, AVX, AVX-512, ARM NEON)

https://www.kfrlib.com

GNU General Public License v2.0

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Availability of functionality #153

Closed trig-ger closed 6 months ago

trig-ger commented 2 years ago

Hi.

Are there any implementations of the following functionality in the KFR library, with intrinsics:

correlation of two vectors, with a single double-number output (Pearson correlation coefficient), and a correlation of two complex vectors;
shift of signal carrier frequency;
interpolation of signal samples with preservation of signal frequency characteristics (the one "resampling" on FFT is too slow) - like Farrow filter, using Lagrange polynomial?

I tried but didn't find it.

ghost commented 2 years ago

I don't think pearson is very hard to calculate with correlation but I wonder too what else you can do with the FIR filter. Spuce has a farrow filter but not any kind of good convolution.