Computer Science ›› 2017, Vol. 44 ›› Issue (4): 207-212.doi: 10.11896/j.issn.1002-137X.2017.04.045

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Blind Estimation Method for OFDM Parameter Based on Symbol Kurtosis

ZHANG Hai-chuan and LEI Ying-ke   

  • Online:2018-11-13 Published:2018-11-13

Abstract: Aiming at the poor performance and the large required OFDM symbol number of conventional estimation method for the parameter of OFDM signal when the cyclic-prefix length is short.A method based on symbol kurtosis was proposed to estimate the parameter of OFDM signal.Firstly,we used the trial values of related parameter of OFDM signal in the sample spacing to demodulate the received signal.Secondly,we constructed the symbol kurtosis according to the demodulated baseband symbol.Finally,we proved that the joint estimation for cyclic-prefix length and useful symbol length can be achieved by detecting the lowest value of symbol kurtosis.The experimental simulation results show that the proposed method overcomes the shortcoming of conventional estimation method that it is difficult to estimate the parameter of OFDM signal when the cyclic prefix length is short,and the parameter of OFDM signal could be accurately estimated using less symbols than conventional estimation method.

Key words: OFDM,Symbol kurtosis,Cyclicprefix,Joint estimation

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