Comb Type Pilot Based Channel Estimation using Dft Based Interpolation for Spatial Modulated OFDM Systems

An integration of Spatial Modulation with Orthogonal Frequency Division Multiplexing (SM OFDM) is a recently evolved transmission technique. In practical scenarios, channel estimation significant for detecting transmitted data coherently. Impulse response based interpolation technique that provides frequency estimate reduction in noise error proposed comb type pilot SM OFDM system along 1D techniques under selective channel. This scheme focus on carrying out smoothing and time domain transforming output back to the domain. BER performance investigated Rayleigh employing COST 207 project model two test urban environments (Typical Bad) 4 16 QAM systems. Results show Least Square estimator DFT performs finer compared all one dimensional methods less computational complexity by FFT algorithms.