psfilter_process

Filter the input signal with a pulse shaping filter

Calling sequence

[psf,y] = psfilter_process(psf, x)

Parameters

psf:

Pulse-shaping filter object (as can be created with psfilter_init)

x:

Input signal

y:

Output signal (filtered)

Description

Take as input a signal (already upsampled and constellation mapped), and apply a pulse shaping filter.

Example

// Gaussian filter, 16 samples/symbol, 3*16 taps FIR, B.T. = 0.5
osf = 16;
ntaps = 3 * osf;
BT = 0.5;
psf = psfilter_init('g', osf, ntaps, BT);
b = prbs(20); // Binary sequence to be encoded
x = symmap(b,1,'b'); // NRZ encoding
x = upsample(x, osf);
[psf,y] = psfilter_process(psf,x);
clf();
subplot(211); plot_binary(b);  xtitle("Input signal (binary)");
subplot(212); plot(y); xtitle("Filtered signal");

Example with Gaussian shaping filter


See also