DocumentCode
1861819
Title
A modified carrier frequency estimation method based on self-correlation for QPSK signal
Author
Xia Zhu ; Guilin Zhang
Author_Institution
Science and Technology on Information System Engineering Laboratory, CETC 28th, Nanjing, 210007, China
fYear
2012
fDate
3-5 March 2012
Firstpage
129
Lastpage
132
Abstract
QPSK (Quaternary Phase Shift Key) signal is a carrier frequency restrained modulation signal. In this paper, a novel estimation method based on self-correlation for QPSK signal is proposed. At first, self-correlation biquadratic QPSK signal is analyzed, and then its carrier frequency is estimated with M-Rife (Modified Rife) algorithm instead of estimating frequency only by max frequency line position. The simulation results indicate that our carrier frequency estimation method is feasible and more accurate than the former method, and the RMSE (Root of Mean Square Error) of the modified method is close to CRLB (Cramer-Rao Lower Bound).
Keywords
Modified Rife(M-Rife); carrier frequency estimation; quaternary phase shift key (QPSK); self-correlation;
fLanguage
English
Publisher
iet
Conference_Titel
Automatic Control and Artificial Intelligence (ACAI 2012), International Conference on
Conference_Location
Xiamen
Electronic_ISBN
978-1-84919-537-9
Type
conf
DOI
10.1049/cp.2012.0937
Filename
6492544
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