A comparative study of blind and nonblind trainings in a single-carrier WiMAX (IEEE 802.16-2004) radio

Authors: ALİ ÖZEN

Abstract: Experimental and theoretical bit error rate performance evaluations of blind and nonblind training techniques are obtained by using a single-carrier WiMAX (IEEE 802.16-2004) radio for high-order quadrature amplitude modulation channels. Instead of using a certain type of channel profile, this study concentrates on true frequency-selective Rayleigh fading channels and also evaluates the fast fading scenario of Rayleigh channels in a real-time WiMAX radio environment around 3.5 GHz. The popular least mean squares (LMS) learning algorithm and constant modulus learning algorithm (CMA) are used as benchmarks in an investigation of nonblind and blind trainings, namely recursive least squares (RLS), modified-CMA, normalized-CMA, and fuzzy-CMA. The simulation results demonstrate that the theoretical and experimental studies are compatible with each other and extremely satisfying.

Keywords: Experimental bit error rate, adaptive blind training, equalization, WiMAX (IEEE 802.16-2004), single carrier, constant modulus algorithm, quadrature amplitude modulation

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