Simulation of nonlinear models of QPSK costas loop in MatLab Simulink
Nikolay V. Kuznetsov, Olga Aleksandrovna Kuznetsova, Gennady Alekseevich Leonov, P. Neittaanmäki, M. V. Yuldashev, R. V. Yuldashev · 2014
Nowadays simplified mathematical models and numerical simulation are widely used for the analysis of QPSK Costas loop. In the work it is shown that the use of simplified mathematical models and the application of non-rigorous methods of analysis may lead to wrong conclusions concerning the operability of real model of QPSK Costas loop.