QPSK modulation with carrier and timing recovery loops

QPSK modulation with 50% SRRC pulses, NDA TED and DD PED recovery loops

QPSK modulation with square-root raised cosine pulses of 50% rolloff factor. The timing recovery loops uses an interpolator with Farrow structure with an NDA timing error detector (approximate derivative). The phase recovery loop uses a DD phase error detector. Modified to be run with Matlab 2011b or higher (changed the QPSK modulator and demodulator and value of alpha to 0.5)