Database flexible querying is an alternative to the classic one for users. The use of Formal Concepts Analysis (FCA) makes it possible to make approximate answers that those turned over by a classic DataBase Management System (DBMS). Some applications do not need exact answers. However, flexible querying can be expensive ...Download Now
In this paper, the authors propose a study of performance of the channel estimation using LS, MMSE, LMMSE and Lr-LMMSE algorithms in OFDM (Orthogonal Frequency Division Multiplexing) system which, as known suffers from the time variation of the channel under high mobility conditions, using block pilot insertion. The loss of ...Download Now
The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) standard uses Single Carrier Frequency Division Multiple Access (SC-FDMA) scheme for the uplink transmissions and Orthogonal Frequency Division Multiplexing Access (OFDMA) in downlink. In this paper, the authors point on the Peak-to-Average Power Ratio (PAPR) reduction for the uplink SC-FDMA ...Download Now
In this paper the problem of active fault tolerant control design for noisy systems described by Takagi-Sugeno fuzzy models is studied. The proposed control strategy is based on the known of the fault estimated and the error between the faulty system state and a reference system state. The considered systems ...Download Now
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