Quick Start

What is PySNR?

PySNR is a suite of tools to analyse noise properties in signals in a variety of ways. The features available are listed as follows:

  1. SNR or Signal-to-Noise Ratio

  2. THD or Total Harmonic Distortion

  3. SINAD or Signal to Noise and Distortion Ratio

  4. SFDR or Spurious Fre Dynamic Range

  5. TOI or Third Order Intercept point

Installing PySNR

From the shell of your python environment type:

$ pip install pysnr

MATLAB Equivalent Functions

Signal-to-Noise Ratio (SNR)

MATLAB

PySNR

snr(signal, noise)

snr_signal_noise(signal, noise)

snr(signal,Fs,n)

snr_signal(signal, Fs, n)

snr(pxx,frequencies,n,’psd’)

snr_power_spectral_density(pxx, frequencies, n)

snr(sxx,frequencies,rbw,’power’)

snr_power_spectrum(sxx, frequencies, n)

snr(signal,Fs,n,’aliased’)

snr_signal(signal, Fs, n, aliased=True)

snr(pxx,frequencies,n,’psd’,’aliased’)

snr_power_spectral_density(pxx, frequencies, n, aliased=True)

snr(sxx,frequencies,rbw,’power’,’aliased’)

snr_power_spectrum(sxx, frequencies, n, aliased=True)
Total Harmonic Distortion (THD)

MATLAB

PySNR

thd(signal,Fs,n)

thd_signal(signal, Fs, n)

thd(pxx,frequencies,n,’psd’)

thd_power_spectral_density(pxx, frequencies, n)

thd(sxx,frequencies,rbw,’power’)

thd_power_spectrum(sxx, frequencies, n)

thd(signal,Fs,n,’aliased’)

thd_signal(signal, Fs, n, aliased=True)

thd(pxx,frequencies,n,’psd’,’aliased’)

thd_power_spectral_density(pxx, frequencies, n, aliased=True)

thd(sxx,frequencies,rbw,’power’,’aliased’)

thd_power_spectrum(sxx, frequencies, n, aliased=True)
Signal to Noise and Distortion Ratio (SINAD)

MATLAB

PySNR

sinad(signal,Fs,n)

sinad_signal(signal, Fs, n)

sinad(pxx,frequencies,n,’psd’)

sinad_power_spectral_density(pxx, frequencies, n)

sinad(sxx,frequencies,rbw,’power’)

sinad_power_spectrum(sxx, frequencies, n)
Third-Order Intercept Point (TOI)

MATLAB

PySNR

toi(signal,Fs)

toi_signal(signal, Fs)

toi(pxx,frequencies,’psd’)

toi_power_spectral_density(pxx, frequencies)

toi(sxx,frequencies,rbw,’power’)

toi_power_spectrum(sxx, frequencies)
Spurious Free Dynamic Range (SFDR)

MATLAB

PySNR

sfdr(signal,Fs,msd)

sfdr_signal(signal, Fs,msd)

<Not Implemented>

sfdr_power_spectral_density(signal, Fs,msd)

sfdr(sxx,frequencies,msd,’power’)

sfdr_power_spectrum(sxx, frequencies, msd)