Robust Channel Estimation for STBC-OFDM Communication Systems

Shahana P.S.

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25-Mar-23

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Robust Channel Estimation for STBC-OFDM Communication Systems

Author(s):

Shahana P.S. , Department of Electronics & Communication K.M.E.A Engineering College, Kochi, India

Keywords:

Auxiliary Subspace Pursuit (ASP) Algorithm, Bit Error Rate (BER) Channel Estimation, Decision Feedback Equalizer (DFE), Priori Aided Iterative Hard Threshold (PAIHT) Algorithm, TFT-OFDM System

Abstract:

Transmission of data at high bit rate is necessary for mobile communication. STBC technique helps to transmit multiple copies of a data streams across a number of antennas. Channel estimation plays a major role in demodulating the data coherently. Estimation in STBC-OFDM has been done here using a combination of auxiliary subspace pursuit (ASP) and priori aided iterative hard threshold (PAIHT) algorithm. Additionally, decision feedback equalizer (DFE) improves the overall system efficiency. Simulation results demonstrate that BER performance using combined algorithm of ASP-PAIHT performs better than the algorithm used alone. It is seen that BER becomes even more better when DFE is used.