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BER Perfromance of Joint Time-Frequency TDS-OFDM system under Relaigh Channel


Nimish Kulkarni , Sinhgad College of Engineering,Vadgaon, Pune; Prof. S.A. Shirsat, Sinhgad College of Engineering,Vadgaon, Pune


Channel Estimation, Cyclic Prefix (CP), Fast fading channels, Pilots, Time Domain Synchronous Orthogonal Frequency Division Multiplexing (TDS-OFDM), Training Sequence


To transmit Videos, Images etc. over wireless channels, spectrally efficient technique needs to be developed as the spectrum available is a limited resource. Time Domain Synchronous OFDM (TDS-OFDM) is a technique that is spectrally more efficient than other OFDM techniques. But performance of TDS-OFDM is poor in fast fading channels. In this paper, time-frequency structure is proposed. Each symbol consists of time domain one sample shifted training sequence (TS) as guard interval and frequency domain pilots inserted within the data block .This structure improves performance of TDS-OFDM over fast fading channels maintaining the spectral efficiency. The path delay estimation is carried out using time domain training sequence and path gain estimation is done using frequency domain pilots. Channel estimation can be performed using very few numbers of pilots. Hence spectral efficiency is maintained. Also as channel estimation is carried out using pilots present in data block, inter symbol interference is also negligible compared to normal TDS-OFDM.

Other Details

Paper ID: IJSRDV4I50301
Published in: Volume : 4, Issue : 5
Publication Date: 01/08/2016
Page(s): 700-702

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