一种快速OFDM调制信号识别算法

doi:10.3969/j.issn.1001-2400.2012.01.004

Abstract

Abstract:

The intrinsic time-scale decomposition (ITD) method is a novel algorithm for time-frequency analysis, which can express the dynamic information of non-stationary signals with precise instantaneous parameters. An OFDM modulation recognition algorithm is proposed based on the ITD and the circular data analysis methods. The algorithm extracts three parameters as a co-feature vector to distinguish the OFDM from single carrier modulations. The impact of the carrier frequency, symbol rate and sampling rate on the recognition performance is also considered. The intermediate frequency signal can be processed directly, avoiding the carrier recovery process. Simulation results show that the algorithm can distinguish the OFDM from single carriers successfully even under a low SNR, and that it is also robust to system parameters.

Key words: OFDM recognition, the intrinsic time-scale decomposition (ITD), instantaneous phase, trigonometric moment

CLC Number:

TN92

ZHU Yanrui;TIAN Bin;AN Jinkun;SUN Yongjun;YI Kechu. Fast OFDM modulated signal recognition algorithm[J].J4, 2012, 39(1): 17-22.

References

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Fast OFDM modulated signal recognition algorithm

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