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Fractional Cosine Transform (FrCT)-Turbo based OFDM for underwater acoustic communication

Chen, Yixin and Clemente, Carmine and Soraghan, John and Weiss, Stephan (2015) Fractional Cosine Transform (FrCT)-Turbo based OFDM for underwater acoustic communication. In: Sensor Signal Processing for Defence (SSPD), 2015. IEEE, pp. 147-151. ISBN 9781479974443

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In this paper, a hybrid Discrete Fractional Cosine Transform (DFrCT) with Tikhonov regularization based Turbo Minimum mean square error (MMSE) equalization (DFrCT-Turbo) is presented to suppress inter-carrier interference (ICI) over underwater acoustic channels (UWA). The scheme is based on Orthogonal Frequency Division Multiplex (OFDM) scenario. In addition, an optimal order selecting method for DFrCT is developed by maximizing carrier to interference ratio (CIR) to UWA channel character. Simulation results show that BER improvement of up to 5dBs over traditional orthogonal based methods with moderate complexity.