Publisher review:QPSK modulation system with recover loops - A model to simulate carrier and timinf recovery loops in a QPSK modulation system. This is a model of a QPSK modulation system for transmission over a bandpass channel with fc = 100 Hz and B = 30 Hz and AWGN at the receiver. SRRC filters with excess bandwidth α = 0.18 are employed. The receiver includes an NDA timing recovery loop followed by a DD phase recovery loop.
The transmitter's symbol period is T and set to a value of 100 ms. The symbol period at the receiver is Tr. The model will produce six windows: Two constellation plots and two eye diagrams (for the real part only), at the output of the matched filters and after the recovery loops; a plot of the phase error (output of the NCO) and a plot of the fractional timing error (used in the interpolator). The frequency offset at the receiver is denoted by deltaf. The model simulates the transmission of 8000 QPSK symbols. Requirements: · MATLAB Release: R14SP1 · Communications Blockset
QPSK modulation system with recover loops is a Matlab script for Communication Tools scripts design by Robert Morelos-Zaragoza.
It runs on following operating system: Windows / Linux / Mac OS / BSD / Solaris.
QPSK modulation system with recover loops - A model to simulate carrier and timinf recovery loops in a QPSK modulation system.
Operating system:Windows / Linux / Mac OS / BSD / Solaris
QPSK modulation system with recover loops script details 
