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Báo cáo hóa học: "Research Article Spectral Correlation of Multicarrier Modulated Signals and Its Application for Signal Detection"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Spectral Correlation of Multicarrier Modulated Signals and Its Application for Signal Detection | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 794246 14 pages doi 10.1155 2010 794246 Research Article Spectral Correlation of Multicarrier Modulated Signals and Its Application for Signal Detection Haijian Zhang Didier Le Ruyet EURASIP Member and Michel Terre Electronics and Communications Laboratory CNAM 75141 Paris France Correspondence should be addressed to Haijian Zhang haijian.zhang@cnam.fr Received 31 January 2009 Revised 15 September 2009 Accepted 21 October 2009 Academic Editor Ying-Chang Liang Copyright 2010 Haijian Zhang et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Spectral correlation theory for cyclostationary time-series signals has been studied for decades. Explicit formulas of spectral correlation function for various types of analog-modulated and digital-modulated signals are already derived. In this paper we investigate and exploit the cyclostationarity characteristics for two kinds of multicarrier modulated MCM signals conventional OFDM and filter bank based multicarrier FBMC signals. The spectral correlation characterization of MCM signal can be described by a special linear periodic time-variant LPTV system. Using this LPTV description we have derived the explicit theoretical formulas of nonconjugate and conjugate cyclic autocorrelation function CAF and spectral correlation function SCF for OFDM and FBMC signals. According to theoretical spectral analysis Cyclostationary Signatures CS are artificially embedded into MCM signal and a low-complexity signature detector is therefore presented for detecting MCM signal. Theoretical analysis and simulation results demonstrate the efficiency and robustness of this CS detector compared to traditionary energy detector. 1. Introduction A cyclostationary process is an appropriate