... Chebyshev map, and the SNR is40, 20, 10 dB, respec tively . The signal bandwidth is 200MHz , the sampling frequency is 1 GMHz and the puls elength is 1 μs. In order to show the criterion, the co rre-lation ... signal -to- noise ratios; SDM: symbolic dynamics-based method.Acknowledgements The authors would like to thank the suggestions of the anonymousreviewers. And the authors would like to thank the ... shown.X(t) is the transmitted signal generated by noise source and X(t-Tr) is the returned signal from the target with Tr=2R/c and R isthedistancefromtheradar.Themaindifference between the coherent...