Mohamed Firdaoussi, H. Ghennioui, Mohamed El-Kamili
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New algorithm for blind recognition of OFDM based systems using second-order statistics
This communication addresses the problem of the recognition systems based on OFDM (Orthogonal Frequency-Division Multiplexing). Such a problem arises in various fields of applications among cognitive radio and military applications. We present a new blind discrimination algorithm between the standards: the 3GPP/LTE (3rd Generation Partnership Project/Long Term Evolution, the WiMax IEEE 802.16 (Worldwide Interoperability for Microwave Access), the DVBT-2K (Digital Video Broadcast Terrestrial) and the IEEE 802.22-1K (the first worldwide wireless standard based on cognitive radios). This algorithm is based only on second order statistics. It consists to estimate the chip duration necessary for the recognition system based on OFDM. Computer simulations show that the proposed chip duration parameter estimation algorithm for OFDM can obtain good performances in low SNR and multi-path channel conditions.
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