Title :
A modulation classification using amplitude moments in OFDM systems
Author :
Shimbo, Daisuke ; Oka, Ikuo
Author_Institution :
Adv. Technol. R&D Center, Mitsubishi Electr. Corp., Nagaokakyo, Japan
Abstract :
In adaptive modulation systems, the receiver should identify the modulation employed at the transmitter. This paper presents a new modulation classification method based on amplitude moments and correlation between subcarriers in Orthogonal Frequency Division Multiplexing (OFDM) systems. In the OFDM systems, a frequency offset causes inter-carrier interference (ICI), and the amplitude moments of received signal include ICI components. The proposed method estimates and removes the ICI components using the correlation between subcarriers. Simulation results of classification error probability show that the proposed method is robust to frequency offset.
Keywords :
OFDM modulation; adaptive modulation; error statistics; intercarrier interference; pattern classification; ICI components; OFDM systems; adaptive modulation systems; amplitude moments; classification error probability; frequency offset; intercarrier interference; modulation classification; orthogonal frequency division multiplexing system; receiver; transmitter; Correlation; Error probability; Frequency modulation; OFDM; Receivers; Signal to noise ratio;
Conference_Titel :
Information Theory and its Applications (ISITA), 2010 International Symposium on
Conference_Location :
Taichung
Print_ISBN :
978-1-4244-6016-8
Electronic_ISBN :
978-1-4244-6017-5
DOI :
10.1109/ISITA.2010.5648997
