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Frequency-domain interpolation-based channel estimation in pilot-aided OFDM systems

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Fig.  1  shows  a  typical block diagram  of  an  OFDM system  based  on  pilot-aided  channel  estimation
Fig.  3.  Periodic  CIR  in the  time domain
Fig. 5 illustrates the performance of several channel estima-  tors under different levels of SNR

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