Author
Heidarpour, Ali Reza, Montazerolghaem, M. A., Saberali, S. M.
Publication Date
2016
Publication Place
-
IEEE
Subject
QPSK modulation, Carrier recovery, Co-channel interference, AFC loops, Costas loop
Type
Document
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
2-s2.0-84994071407
Record ID
249dae89-c814-41fb-885f-cfe267af1f95
Date
2016
Sample Text
One of the important challenges in communication systems is drift in the carrier frequency of received signal due to the clock skew and Doppler effect. Every communication receiver requires an automatic frequency control (AFC) loop to estimate the carrier drift in the received signal. One of the well-known AFC loops in communication systems is the Costas loop. In this paper a modified version of Costas loop for binary phase-shift keying (BPSK) modulation is presented which is capable to estimate the carrier frequency of the quadrature phase-shift keying (QPSK) modulation, and therefore significantly simplifies practical implementation. The performance of the modified Costas loop is investigated for the carrier recovery of a QPSK signal in the presence of a co-channel interference. Both simulations and analytical results illustrate that the modified Costas loop may estimate the carrier frequency drift of received signal when the desired signal is stronger than interference.
DOI
10.1109/IranianCEE.2016.7585382
