A new step size control technique for blind and non-blind equalization algorithms

Ali Özen

A new variable step size (VSS) control technique employing cross correlation between channel output and error signal has been proposed as a solution to the problem of slow convergence of blind and non-blind equalization algorithms. The new method resolves the conflict between the convergence rate and low steady state error of the fixed step-size conventional blind and non-blind equalization algorithms, such as Constant Modulus Algorithm (CMA) and Least Mean Squares (LMS) algorithm. Computer simulations have been performed to verify the performance of the proposed method in frequency selective ...Daha fazlası

Makale/Derleme 2013 Radioengineering Journal 10 Görüntülenme

A Novel Variable Step Size Adjustment Method Based on Autocorrelation of Error Signal for the Constant Modulus Blind Equalization Algorithm

Ali ÖZEN

A novel variable step size constant modulus algorithm (VSS-CMA) based on autocorrelation of error signal has been proposed to improve the weakness of previous VSSCMAs for application to blind equalization in this paper. Computer simulations have been performed to illustrate the performance of the proposed method in frequency selective Rayleigh fading channels. The obtained simulation results using WiMAX (IEEE 802.16-2004) radio standard have demonstrated that the proposed VSS-CMA algorithm has considerably better performance than conventional CMA, normalized CMA (NCMA) and the other VSS-CMA al ...Daha fazlası

Makale/Derleme 2012 Radioengineering Journal 6 Görüntülenme

Improving the efficiency of frequency domain equalization in conventional coherent optical OFDM system using discrete wavelet transform

Ali ÖZEN

In this paper, a novel discrete wavelet transform-based coherent optical OFDM system, which improved the performance of the frequency domain equalizer by using discrete wavelet transform in the conventional coherent optical OFDM system, is proposed as a solution to data transmission speed and distance problems limited by the fiber nonlinearity and optical noise of optical channels. The greatest novelty of this study is that the discrete wavelet transforms and coherent optical OFDM systems are combined in the proposed technique. Simulation results are shown to verify the effectiveness of the pr ...Daha fazlası

Makale/Derleme 2016 OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS 5 Görüntülenme

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A new step size control technique for blind and non-blind equalization algorithms

Ali Özen

A Novel Variable Step Size Adjustment Method Based on Autocorrelation of Error Signal for the Constant Modulus Blind Equalization Algorithm

Ali ÖZEN

Improving the efficiency of frequency domain equalization in conventional coherent optical OFDM system using discrete wavelet transform

Ali ÖZEN