A Costas loop is one of the classical phase-locked loop based circuits, which demodulates data and recovers carrier from the input signal. The Costas loop is essentially a nonlinear control system and its nonlinear analysis is a challenging task. In this article for a modified QPSK Costas loop we analyze the hold-in, pull-in and lock-in ranges. New procedure for estimation of the lock-in range is considered and compared with previously known approach.

Original languageEnglish
Pages (from-to)31-35
Number of pages5
JournalIFAC-PapersOnLine
Volume52
Issue number16
DOIs
StatePublished - 2019
Event11th IFAC Symposium on Nonlinear Control Systems, NOLCOS 2019 - Vienna, Austria
Duration: 4 Sep 20196 Sep 2019

    Scopus subject areas

  • Control and Systems Engineering

    Research areas

  • Costas loop, Lock-in range, Non-linear analysis, Numerical simulation, PLL, PSK demodulator

ID: 50641982