| 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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