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Semi-blind joint CFO, channel estimation and data detection for OFDM systems over doubly selective channels (DSCs) is investigated in this work. A joint iterative algorithm is developed based on the maximum a posteriori expectation-maximization (MAP-EM) algorithm. In addition, a novel algorithm is also proposed to obtain the initial estimates of CFO and channels. Simulation results show that the performance...
In this paper, a new back propagation (BP) algorithm with adaptive momentum is proposed, where the momentum coefficient is adjusted iteratively based on the current descent direction and the weight increment in the last iteration. A convergence result of the algorithm is presented when it is used for training feed forward neural networks (FNNs) with a hidden layer. Simulation results have shown that...
Complex signal representations are being frequently employed in various adaptive filtering applications such as wireless communications, beamforming, etc. In this paper, a novel complex optimum block adaptive algorithm with individual adaptation of parameters (Complex OBAI-LMS) is presented. The proposed technique effectively utilizes the degrees of freedom of the adaptive filter by individually adapting...
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