DSPtools

Various tools for DSP purposes:

Python

• waveform_coeff_header_generator.py to design waveform periods samples and export the coefficients to an header .hpp file for C/C++ usage

  • usage example: ./waveform_coeff_header_generator.py -f 100 -sf 100 -a 1 -shape sin -dtype double

    optional arguments:
      -h, --help    show this help message and exit
      -name NAME    header file name
      -f FHZ        frequency in Hz
      -sf SAMPF     sampling factor (default:20)
      -a AMPV       amplitude in V
      -phi0 PHI0    phase shift in rads
      -shape SHAPE  waveform shape [tri saw square sin]
      -dtype DTYPE  samples data type [int,int64,float,double]
    

    ​

• lpf_fir_design.py to design LPF FIR filters (based on scipy.signal.firwin and kaiser window) and export the coefficients to an header .hpp file for C/C++ usage

  • usage example: ./lpf_fir_design.py -sr 1000 -tbw 0.2 -sba 20 -cut 0.3

    optional arguments:
      -h, --help  show this help message and exit
      -name NAME  header file name
      -sr SR      sample rate [Hz]
      -tbw TBW    transition bandwidth (normalized to sample_rate/2) 0.0 -> 1.0
      -sba SBA    attenuation in stop band (dB)
      -cut CUT    cutoff frequency (normalized to sample_rate/2) 0.0 -> 1.0
    

C/C++

• cplot_utils.h header-only minimal C interface to GNU plot for simple single trace in-code data logging and plotting

  • usage:

    cplot_append(double x, double y); // to append a data point
    cplot_plot(); 					  // to display plot
    

Matlab

• Various DSP functions in ./Matlab/
  • clark/inverse clark transform
  • park/inverse park transform
  • lti system delay and distortion measure
  • simplified FFT plot interface
  • phase equalizer filter designer