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Research on Digital Signal Processing of Wireless Anti-Jamming Data Link Node Based on FPGA
Abstract:
Wireless anti-jamming data link was widely applied in modern electronic warfare environment recently. Anti-jamming function of wireless data link was realized by constantly changing the signal carrier frequency according to a specific pseudo-random sequence. Frequency switching time and bandwidth were the main factors of frequency hopping anti-jamming performance. With the development DDS technology, frequency switching time and bandwidth had been improved significantly. The hardware of anti-jamming data link node in this paper was composed of frequency synthesizer module and FPGA control module taking advantage of both DDS technology and FPGA. Frequency synthesizer module was under the control of FPGA to output appropriate frequency carrier signal. FPGA control module is designed in Quartus II software development platform environment. The frequency tuning and control of frequency synthesizer module output signal were operated through serial or parallel I/O ports. Two kinds of configuration mode were designed in FPGA control module: serial configuration mode and parallel configuration mode. Digital signal data process in serial configuration logic and parallel configuration logic of FPGA control module were studied especially. The main function of serial configuration logic and parallel configuration logic were realized to process the digital signal data under appropriate time sequence correctly. By the correct time sequence of reading and writing function, frequency synthesizer module worked well with FPGA control module. Simulation and experiment results showed that anti-jamming data link node outputted stable frequency carrier signals by the excellent processing of digital signal data transferred between FPGA control module and frequency synthesizer module.
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Pages:
167-171
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Online since:
April 2021
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© 2021 Trans Tech Publications Ltd. All Rights Reserved
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