Method and system for generating instantaneous broadband multi-frequency composite radar signal based on engineering implementation

Abstract

The invention relates to a method and a system for generating instantaneous broadband multi-frequency composite radar signals based on engineering implementation. For the carrier signal from the radar carrier source, the design is carried out from the aspects of frequency and broadband. Instantaneous multi-frequency carrier signals to obtain flexible and diverse broadband LPI signals with low signal-to-noise ratio, that is, composite radar transmission signals, overcoming the ultra-high-speed AD sampling, large-capacity data transmission network, and high-speed digital signal processor brought about by engineering implementation. Due to the limitation of hardware resources, the obtained composite radar transmission signal is used in practical projects, and the signal-to-noise ratio (SNR) of the wideband signal is high, which can effectively improve the anti-jamming and anti-interception performance of the radar.

Description

technical field [0001] The invention relates to a method and system for generating an instantaneous broadband multi-frequency composite radar signal based on engineering, and belongs to the technical field of composite radar signal design. Background technique [0002] With the development of modern military science and technology, especially with the advancement of related disciplines such as microelectronics technology and signal information processing technology, radar-related electronic interference and anti-jamming have become one of the focuses of future battlefield competition, making radar's The application environment is deteriorating day by day, and it is very vulnerable to the reconnaissance of enemy reconnaissance equipment and the subsequent interference, or even direct attack. Therefore, the status quo of the complex environment in all aspects of the battlefield has contributed to the proposal of the concept of Low Probability of Intercept Radar (LPI radar) and...

AI Technical Summary

Problems solved by technology

[0003] However, many theoretical foundations of wideband radar are not yet fully mature, and many key technologies, such as the reduction in the number of accumulated pulses caused by the movement of cross-distance units within the coherent processing interval (Coherent Processing Interval: CPI) in wideband detection, are still in theoretical research. In the process; in addition, broadband signals are restricted by hardware resources such as ultra-high-speed AD sampling, large-capacity data transmission networks, and high-speed digital signal processors in engineering implementation. Some conventional methods are difficult to implement on the actual hardware platform.

As far as the current state is concerned, conventional radars still use narrowband (several megahertz) signals, but the modulation form of linear frequency modulation is too simple to be used as an effective anti-intercept signal

In addition, the existing simultaneous multi-frequency instantaneous broadband signal has a single form and low SNR (Signal-to-Noise Ratio), which seriously affects the anti-intercept performance and target detection. At present, there is no practical solution for this aspect, especially for engineering applications. Related reports

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