ABSTRACT Noise Frequency Modulated (NFM) interference causes a disaster to almost all types of Radar systems. The echo signal and the interference are overlapped and because of strong energy of the NFM interference noth-ing could be detected except the interference in the Radar receiver system. Up to now no good method against NFM has been declared, conventional methods are based on the passive Radar to track the interfer-ence source which are not applicable under most conditions. Here a novel anti-noise FM method is proposed to suppress the NFM interference, the method multiply the mixed signal two times by different reference signals. The principle and some key factors of the new method are analyzed in detail and some rules for pa-rameters designing are given. What’s more, results show that the method can eradicate NFM effectively.
Cite this paper
C. JIANG, M. GAO and D. CHEN, "A New Method for Anti-Noise FM Interference," Wireless Sensor Network, Vol. 1 No. 4, 2009, pp. 293-299. doi: 10.4236/wsn.2009.14036.
 G. S. Liu, X. Q. Shi, J. H. Lu, etc. “Design of noise FM-CW radar and its implementation,” IEE Proc–F, Vol. 138, No. 5, pp. 420–426, 1991.
J. H. Lu and X. Q. Shi, “The study on the stationariness and the ergodicity of zero IF signal in Noise FM-CW Radar,” Modern Radar, No. 4, pp. 28–36, 1992.
C. X. Dong, S. Q. Yang, G. Q. Zhao, and Y. Zhang, “Effect of noise FM jamming against ISAR imaging,” CIE International Conference of Radar Proceedings, 2007.
C. J. Song and J. Y. Zhang, “The analysis of the performance of radar MTI in noise FM jamming environment,” Proceeding of ICSP2000, Beijing, pp. 1947–1950, 2000.
J. B. Liu, L. J. Wang, and H. C. Zhao, “Performance analysis of anti-noise FM jamming of pseudo-random code fuzes,” Journal of Electronics & Information Technology, Vol. 26, No. 12, pp. 1925–1932, 2004.
X. G. Zhou, H. C. Zhao, and Y. C. Tu, “Performance analysis of anti-noise FM jamming of pseudo-random code binary phase modulation fuze based on Doppler effect,” IEEE 2007 Interna-tional Sym posium on Microwave, Antenna, Propagation, and EMC Technologies for wireless communications, pp. 1424–1427.
S. T. Xu, and S. Q. Yang, “Multipath jammer tracking with a passive radar seeker,” Systems Engineering and Electronics, Vol. 25, pp. 31–109, 2003.
X. Q. Chen, “Direction-finding technology of two noise FM jamming for passive seeker,” Modern Defense Technology, Vol. 34, pp. 59–62, 2006.
K. D. Rao, etc., “Instantaneous frequency based
nonlinear adaptive filter for interference suppression in spread spectrum systems,” The 47th Midwest Sympo-sium on Circuits and Systems, 2004.
Monfared, Mohsen Tavoosi, Yargholi, and Mostafa, “Suppres-sion of jamming in GPS receivers using subspace projection technique,” Proceedings of the Fifth IASTED International Conference on Communications, Internet, and Information Technology, CIIT 2006.
M. G. Amin, etc., “Performance analysis of subspace projec-tion techniques for anti-jamming GPS using spatio-temporal interference signatures,” IEEE Workshop on Statistical Sig-nal Processing Proceedings, 2001.
S. C. Jang, Loughlin, and J. Patrick, “AM-FM interference excision in spread spectrum communications via projection filtering,” Eurasip Journal on Applied Signal Processing, 2001.
S. N. Zhang, H. C. Zhao, and G. Xiong, “The method of excis-ing noise frequency modulation interference for pseudo-random coded fuze based on square transformation,” Journal of Missile and Homing, 2006.