Open AccessComb Type Pilot Based Channel Estimation using Dft Based Interpolation for Spatial Modulated OFDM Systems
Author(s) -
Anetha Mary Soman,
R. Nakkeeran,
Shinu Mathew John
Publication year - 2021
Publication title -
international journal of engineering and advanced technology
Language(s) - English
Resource type - Journals
ISSN - 2249-8958
DOI - 10.35940/ijeat.e2897.0610521
Subject(s) - orthogonal frequency division multiplexing , algorithm , frequency domain , channel (broadcasting) , estimator , computer science , fast fourier transform , interpolation (computer graphics) , smoothing , impulse response , bit error rate , electronic engineering , mathematics , telecommunications , engineering , statistics , computer vision , mathematical analysis , frame (networking)
An integration of Spatial Modulation withOrthogonal Frequency Division Multiplexing (SM OFDM) is arecently evolved transmission technique. In practical scenarios,channel estimation is significant for detecting transmitted datacoherently. Impulse response based interpolation technique thatprovides channel frequency response estimate with reduction innoise error is proposed for comb type pilot based channelestimation of SM OFDM system along with 1D interpolationtechniques under frequency selective channel. This scheme focuson carrying out smoothing and estimation in time domain andtransforming output back to the frequency domain. BERperformance is investigated for Rayleigh channel employingCOST 207 project model on two test urban environments (Typicaland Bad) for 4 and 16 QAM SM OFDM systems. Results showthat the Least Square estimator with DFT interpolation performsfiner compared to all one dimensional interpolation methods withless computational complexity by employing FFT algorithms.