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Performance Enhancement through Reduced Complexity Channel Estimation Algorithm for 4G OFDM Systems


C. Padmaja and Dr. B. L. Malleswari


Vol. 17  No. 4  pp. 140-143


The channel estimation algorithms play a vital role in third generation (3G) communication systems to support efficient spectrum utilization. The transition from 3G to 4G systems is to provide high data rate, error free low complexity system with efficient adaptive techniques. A noisy Channel estimation and feedback error introduces imperfect Channel State Information (CSI). This paper introduces a modified optimum SNR threshold set using Levenberg Marquardt (LM) algorithm and is used in selecting the modulation scheme and it improves the average spectral efficiencies.


OSTBC, Bit error rate, Spectral Efficiency, Moment generating function.