ICI Cancellation using Zero-Padded Conjugate Transmission with Adaptive Receiver for OFDM Systems
Amandeep Kaur1, Garima Saini2
1Amandeep Kaur, M.E Student (E.C.E), National Institute of Technical Teachers Training and Research, Sector-26, Chandigarh, India.
2Mrs. Garima Saini, Assistant Professor (E.C.E) National Institute of Technical Teachers Training and Research, Sector-26, Chandigarh, India.
Manuscript received on June 04, 2013. | Revised Manuscript received on June 27, 2013. | Manuscript published on July 05, 2013. | PP: 278-281 | Volume-3 Issue-3, July 2013. | Retrieval Number: C1718073313/2013©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: To overcome the effect of Intercarrier Interference (ICI) in OFDM system, the Zero-padded Conjugate scheme with adaptive receiver is proposed. In the conjugate algorithm first path contains the regular OFDM signal and in second path conjugate of first path is transmitted using Time Division multiplexing (TDM) for Time variant channels. Zero padding is done between two consecutive symbols to mitigate the effect of intercarrier interference to provide better time and frequency synchronization. Adaptive receiver uses block least mean-squared algorithm (BLMS) to adaptively update the frequency offset error. The simulation results are carried out using BPSK, QPSK and 16-QAM modulation techniques. The proposed scheme provides better BER rate than regular OFDM system, Conjugate cancellation (CC) and previous work for AWGN channel. Keywords: Orthogonal frequency division multiplexing (OFDM), Adaptive receiver, Block least mean-squared (BLMS) algorithm, Intercarrier Interference (ICI), frequency offset.
Keywords: Orthogonal frequency division multiplexing (OFDM), Adaptive receiver, Block least mean-squared (BLMS) algorithm, Intercarrier Interference (ICI), frequency offset.