Technical Program

Paper Detail

Paper:SPCOM-P9.5
Session:(Semi)blind Techniques II
Time:Thursday, May 20, 15:30 - 17:30
Presentation: Poster
Topic: Signal Processing for Communications: (Blind/Semiblind) Channel Estimation
Title: A FAST BLIND EQUALIZATION METHOD BASED ON SUBGRADIENT PROJECTIONS
Authors: Can Kizilkale; Koç University 
 Alper Erdogan; Koç University 
Abstract: A novel blind equalization method based on a subgradient searchover a convex cost surface is proposed. This is an alternativeto the existing iterative blind equalization approaches such asConstant Modulus Algorithm (CMA) which mostly suffer from theconvergence problems caused by their non-convex cost functions.The proposed method an iterative algorithm, for both real andcomplex constellations, with a very simple update rule thatminimizes the $l_\infty$ norm of the equalizer output under alinear constraint on the equalizer coefficients. The algorithm has a nice convergence behavior attributed to the convex $l_\infty$ cost surface. Examples are provided to illustrate the algorithm's performance.
 
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