The Effect of Notch Filter on RFI Suppression

Wenge CHANG; Jianyang LI; Xiangyang LI

doi:10.4236/wsn.2009.13026

Home > Journals > Computer Science & Communications > WSN

Wireless Sensor Network > Vol.1 No.3, October 2009

The Effect of Notch Filter on RFI Suppression ()

Wenge CHANG, Jianyang LI, Xiangyang LI

DOI: 10.4236/wsn.2009.13026 PDF HTML 5,786 Downloads 10,295 Views Citations

Abstract

Radio Frequency Interference (RFI) suppression is an important technique in the ultra-wideband synthetic aperture radar (UWB SAR). In this paper, we mainly analyze the performance of a notch filter for RFI sup-pression. The theoretical output from notch filter is presented based on RFI signal’s narrowband property. The research conclusion shows that the notch filter has significant effect on sidelobes of the system response, which might be considered to be false targets, however it has little effect on the resolution of the system re-sponse. The theoretical result is verified by simulation and experimental data processing both in one dimen-sion (range dimension) and in two dimensions (range and azimuth dimension).

Keywords

RFI Supression, Matched Filter, Notch Filter, SAR

Share and Cite:

W. CHANG, J. LI and X. LI, "The Effect of Notch Filter on RFI Suppression," Wireless Sensor Network, Vol. 1 No. 3, 2009, pp. 196-205. doi: 10.4236/wsn.2009.13026.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	T. Koutsoudis and L. Lovas, “RF interference suppression in ultra wideband radar receivers,” in Algorithms for Synthetic Aperture Radar Imagery II (D.A. Giglio, ed.), SPIE, Orlando, FL, Vol. 2487, pp. 107–118, April 1995.
[2]	T. Miller, L. Potter, and J. McCorkle, “Army research labora-tory RFI suppression for ultra wideband Radar,” IEEE Trans-actions on Aerospace and Electronic Systems, Vol. 33, No. 4, pp. 1142–1156, October 1997.
[3]	R. T. Lord and M. R. Inggs, “Efficient RFI suppression in SAR using LMS adaptive filter integrated with range/ Doppler algo-rithm,” Electronics Letters, Vol. 35 No. 8, pp. 629–630, April 15, 1999.
[4]	R. T. Lord and M. R. Inggs, “Approaches to RF interference suppression for VHF/UHF synthetic aperture radar,” Commu-nications and Signal Processing, COMSIG’98, pp. 95–100, 1998.
[5]	X. Luo, L. M. H. Ulander, J. Askne, G. Smith and P. O. Frolind, “RFI suppression in ultra-wideband SAR systems using LMS filters in frequency domain,” Electronics Letters, Vol. 37, No. 4, February 15, 2007.
[6]	G. W. Davidson, I. G. Cumming, and M. R. ITO, “A chirp scaling approach for processing squint mode SAR data,” IEEE Transactions on Aerospace Electronic Systems, Vol. 32, pp. 121–133, 1996.