On combinations of CMA equalizers

We extend the affine combination of one fast and one slow least meansquare (LMS) filter to blind equalization, considering the combination of two constant modulus algorithms (CMA). We analyze the proposed combination in stationary and nonstationary environments verifying that there are situations where the absence of the restriction on the mixing parameter can be advantageous for the combination. Furthermore, we propose a combination of two CMAs with different initializations. Preliminary simulations show that this scheme can avoid local minima and eventually can present a faster convergence rate than that of its components.

• Type: Conference
• Year: 2009
• Where: ICASSP
• Authors: Renator Candido, Magno T. M. Silva, Vitor H. Nascimento
• Keywords: Affine Combination, Blind Equalization, Constant Modulus Algorithms, ICASSP 2009, Signal Processing