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On Effects of Frequency Offset on Simulink Model of OFDM

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Abstract

OFDM is a multicarrier transmission technique, widely preferred due to advantages like high data rate, less bandwidth consumption and channel robustness. IEEE 802.11a standard uses conventional OFDM which uses IFFT for generating orthogonal carriers and multiplexing. Due to extra bandwidth consumption by cyclic prefix in conventional OFDM, DWT has now emerged as new alternative over FFT. It offers advantages like increased spectral efficiency, better orthogonality and less bit error rate. Performance degradation due to frequency offsets has been reported in literature. Carrier frequency offset (CFO) arises due to Doppler shift and imperfect synchronisation of transmitter and receiver. CFO results in inter-carrier interference that effect BER. In this paper, we investigated the offset effect on conventional and DWT-based OFDM under different communication channels (AWGN and Rayleigh). Effect of different modulation techniques and wavelets on DWT-OFDM model is also analysed.

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Authors and Affiliations

  1. Department of Electronics and Communication, University Institute of Engineering and Technology, Panjab University, Chandigarh, India

    Navdeep Kaur & Naresh Kumar

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  1. Navdeep Kaur
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  2. Naresh Kumar
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Correspondence to Naresh Kumar.

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Kaur, N., Kumar, N. On Effects of Frequency Offset on Simulink Model of OFDM. Wireless Pers Commun 115, 2349–2361 (2020). https://doi.org/10.1007/s11277-020-07685-5

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