Investigations on wavelet and Fourier transform based channel estimation in MIMO-OFDM system

  • Authors

    • B Somasekhar
    • Ch Mohana Krishna
    • Y Murty
    2018-04-20
    https://doi.org/10.14419/ijet.v7i2.21.12178
  • Discrete Fourier Transform (DFT), Discrete Cosine Transform (DCT), Discrete Wavelet Transform (DWT), Channel Estimation.

  • Abstract

    In this paper channel estimation methods for MIMO-OFDM system are investigated based on Fourier Transform and Wavelet Transform. The channel estimation algorithm based on Discrete Fourier Transform (DFT) cause energy leakage in multipath channel with non-sample-spaced time delays. Discrete Cosine Transform (DCT) based channel estimator can mitigate the drawback of Discrete Fourier Transform based channel estimator, when the non-sample spaced path delays are available in multipath fading channels. Wavelet based systems provide better spectral efficiency because of no cyclic prefix requirement, with narrow side lobes and also exhibit improved BER performance. Simulation results reveal that the DWT based transform outperforms the conventional DFT and DCT based channel estimator in terms of bit error rate and mean square error.

     

     

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  • How to Cite

    Somasekhar, B., Mohana Krishna, C., & Murty, Y. (2018). Investigations on wavelet and Fourier transform based channel estimation in MIMO-OFDM system. International Journal of Engineering & Technology, 7(2.21), 228-231. https://doi.org/10.14419/ijet.v7i2.21.12178

    Received date: 2018-04-26

    Accepted date: 2018-04-26

    Published date: 2018-04-20