qampy.core.filter

Filter functions for matched filtering, pulse-shaping and impairment simulation.

Functions

filter_signal(signal, fs, cutoff[, ftype, ...])	Apply an analog filter to a signal for simulating e.g.
moving_average(sig[, N])	Moving average of signal
pre_filter(signal, bw)	Low-pass pre-filter signal with square shape filter
pre_filter_wdm(signal, bw, os[, center_freq])	Ideal LP filter for selecting part of the spectrum.
rrcos_freq(f, beta, T)	Frequency transfer function of the square-root-raised cosine filter with a given roll-off factor and time width/sampling period after _[1]
rrcos_pulseshaping(sig, fs, T, beta[, taps])	Root-raised cosine filter applied in the time domain using fftconvolve.
rrcos_time(t, beta, T)	Time impulse response of the square-root-raised cosine filter with a given roll-off factor and time width/sampling period after _[1] This implementation differs by a factor 2 from the previous.