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Concurrent Equalizer with Squared Error Weight-Based Tap Coefficients Update
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 Title & Authors
Concurrent Equalizer with Squared Error Weight-Based Tap Coefficients Update
Oh, Kil-Nam;
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For blind equalization of communication channels, concurrent equalization is useful to improve convergence characteristics. However, the concurrent equalization will result in limited performance enhancement by continuing concurrent adaptation with two algorithms after the equalizer converges to steady-state. In this paper, to improve the convergence characteristics and steady-state performance of the concurrent equalization, proposed is a new concurrent equalization technique with variable step-size parameter and weight-based tap coefficients update. The proposed concurrent vsCMA+DD equalization calculates weight factors using error signals of the variable step-size CMA (vsCMA) and DD (decision-directed) algorithm, and then updates the two equalizers based on the weights respectively. The proposed method, first, improves the error performance of the CMA by the vsCMA, and enhances the steady-state performance as well as the convergence speed further by the weight-based tap coefficients update. The performance improvement by the proposed scheme is verified through simulations.
Concurrent Equalizer;Blind Equalization;CMA;Step-Size Parameter;vsCMA;
 Cited by
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