qampy.impairments

Functions for the simulation of transmission and transceiver impairments.

Functions

add_awgn(sig, strgth)	Add additive white Gaussian noise to a signal.
add_carrier_offset(sig, fo)	Add frequency offset to signal
add_dispersion(sig, D, L[, wl0])	Add dispersion to a signal
add_modal_delay(sig, delay)	Add a modal delay of n-symbols to modes of signal, e.g.
apply_PMD(field, theta, t_dgd)	Apply PMD to a given input field
apply_phase_noise(signal, df)	Add phase noise from local oscillators, based on a Wiener noise process.
change_snr(sig, snr)	Change the SNR of a signal assuming that the input signal is noiseless
rotate_field(field, theta)	Rotate a dual polarisation field by the given angle
sim_DAC_response(sig[, enob, clip_rat, ...])	Function to simulate DAC response, including quantization noise (ENOB) and frequency response.
sim_mod_response(sig[, dcbias, gfactr, ...])	Simulate IQ modulator response.
sim_tx_response(sig[, enob, tgt_v, ...])	Simulate a realistic transmitter possibly including quantization, noise due to limited ENOB, and DAC frequency response
simulate_transmission(sig[, snr, freq_off, ...])	Convenience function to simulate impairments on signal at once