Joint Estimation of Doppler and Time Delay of Wideband Echoes for LFM Pulse Radar Based on Fractional Correlation in Impulse Noise Environment

Abstract:

A new method to estimate the Doppler and multipath time delay is presented in impulse noise environment. First, the Doppler is estimated by energy cumulation of multipath component based on fractional lower-order-frational correlation transform. Then, an order-reduced signal is reconstructed combining the Doppler with the prior knowledge of the transmitted signal, and the echoes signal is converted to many single-frequency signals. Finally, the multipath time delay is obtained by the fractional lower-order power spectrum method. The method is adapted for low SNR noise, can restrain the affection of the cross-items, and has a high time-delay estimation resolution. Some computer simulations are given in this paper and the results show that the new method is valid.

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 3706-3709
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.3706
• Online since: July 2014
• Authors: Li Li*
• Keywords: Fractional Correlation, Fractional Lower Order Statistics, Impulse Noise, LFM Pulse Signal

References

[1] P. Stoica, J. Li, Y. Xie, On Probing Signal Design For MIMO Radar, IEEE Trans. Signal Process, 2007 55(8): 4151- 4161.

DOI: 10.1109/tsp.2007.894398

[2] S.Y. Chao, B.X. Chen, C.C. Li, Grid cell based detection strategy for MIMO radar with widely separated subarrays, AEU-International Journal of Electronics and Communications, 2012 66(9): 741-751.

DOI: 10.1016/j.aeue.2012.01.006

[3] C.C. Li, G.S. Liao, S.Q. Zhu, S.Y. Wu, An ESPRIT-like algorithm for coherent DOA estimation based on data matrix decomposition in MIMO radar, Signal Processing, 2011 91(8): 1803-1811.

DOI: 10.1016/j.sigpro.2011.02.004

[4] J.Y. Zhang, Z.D. Zheng, X.B. Li, An algorithm for DOD- DOA and Doppler frequency joint estimating of bistatic MIMO radar, Journal of Electronics & Information Technology, 2010 32(8): 1843-1848.

DOI: 10.3724/sp.j.1146.2009.01133

[5] J. Li, P. Stoica, W . Roberts, On parameter identifiability of MIMO radar, IEEE Signal Processing Letters, 2007 14(12): 968-971.

DOI: 10.1109/lsp.2007.905051

[6] J. Qu, M.W. Kon, Z. Q. Luo, The estimation of time delay and Doppler stretch of wideband signals, IEEE Trans. Signal Process, 1995 43(4):. 904-916.

DOI: 10.1109/78.376843

[7] C.L. Nikias, M. Shao, Signal processing with alpha stable distributions and applications, New York: John Wiley & Sons Inc, (1995).

[8] H.M. Ozaktas, Z. Zalevsky, M.A. Kutay, The fractional Fourier transform with applications in optics and signal processing, Chichester: John Wiley& Sons, (2001).