1. Zhou, Y., Shen, B., Ling, L., Xia, J., Yang, T., Lu, Q., Zhou, Y., & Liu, Y. (2020). Research on tunnel wireless communication technology. In International conference on wireless communications and smart grid (ICWCSG).
2. Ma, Y., Wang, R., & Du, J. (2013). Amplitude characteristics of linear frequency modulation signal in FRFT domain[C]. In IEEE international conference on signal and image processing applications, (pp. 431–434).
3. Jacob, R., Thomas, T., & Unnikrishnan, A. (2009). Fractional fourier transform based chirp detector versus someconventional detectors. In International symposium on ocean electronics (SYMPOL 2009), (pp. 56–65).
4. Min, M., Jingye, C., & Xihui, Z. (2010). An estimation algorithm of chirp based on fractional fouriertransform and frequency domain differential. In International Conference on computational problem-solving. (pp. 218–221).
5. Ren, H., Hu, X., Xu, F., Jun, X., Qing, W., Zhan, C., & Chen, Y. (2014). SNR estimation algorithm of LFM signal based on FrFT for long range and shallow underwater acoustic communication systems, OCEANS 2014-TAIPEI, (pp. 1–6).