A New Method for Anti-Noise FM Interference

Changyong Jiang; Meiguo Gao; Defeng Chen
November 2009
Wireless Sensor Network;Nov2009, Vol. 1 Issue 4, p294
Academic Journal
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 nothing 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 interference 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 parameters designing are given. What's more, results show that the method can eradicate NFM effectively.


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