Abstract: Noise FM jamming which has wide jamming band and large noise power is widely used in processing backup jamming to radar, fuze and communication. The paper adopt DDS combines with characteristic of FPGA chip to generate noise FM jamming. The method has large improvement in precision, structure and speed, and has broad application and prospect.

Key words: Noise FM jamming, Direct Digital Synthesizer(DDS), Field-Programmable Gate Array(FPGA)