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If you want to test the performance of you LTSpice design, you can feed the recorded noisy signal as the input of the circuit, and probe the waveform at the output to observe, or save the output as a .wav file, then feed into GNURadio to see what's the PSR count of the filtered signal.
To do so:
- Right click the power source, under "style", choose "PWL FILE="..."".
- Fill in the path to the .dat file, or simply click "Browse" and select the file
- Use Net Name to label your output, i.e. VOUT
- Add analysis command line ".tran 0 1ms"
- Add this line in the SPICE directive: ".wave 'name_the_file.wav' 16 4e6 VOUT".
- 16 is number of bits, ranging from 1 to 32. The higher the bits the slower the simulation
- 4e6 is the sample rate of the simulation. Similarly, the higher the sample rate, the slower the simulation.
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