Verification and simulation integrated system for radar intermediate frequency signal simulation processing

Abstract

The invention discloses a verification and simulation integrated system for radar intermediate frequency signal simulation processing, which includes an adjustable analog processing link connected to each other and a main control module, and the adjustable analog processing link includes sequentially connected for access to be verified The front-end conditioning module for the front-end conditioning of the radar intermediate frequency signal or the radar echo signal to be simulated, the amplitude-frequency characteristic adjustment module for adjusting the amplitude-frequency characteristics of the input intermediate frequency signal, and the amplitude-frequency characteristic adjustment module is controlled by the main control module. The control signal is sent to the amplitude-frequency characteristic adjustment module in real time, so as to realize the verification or simulation of the radar intermediate frequency signal analog processing. The invention can realize the integration of radar intermediate frequency signal simulation processing verification and simulation, and has the advantages of simple and compact structure, low cost, high execution efficiency and strong flexibility.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to an integrated verification and simulation system for radar intermediate frequency signal simulation processing. Background technique [0002] Radar detection is based on the principle of the emission of electromagnetic waves and the reflection of objects on electromagnetic waves. The azimuth of the object is positioned by the difference in frequency and phase between the emission and reflection of electromagnetic waves. Since there are many reflectors of radar electromagnetic waves in the real environment, the reflection paths are intricate. Generally, signal generators and simulators can only generate some specific regular echo waveforms, and it is difficult for the simulated intermediate frequency signal to take into account the characteristics of the front-end signal such as the RF leakage of the RF front-end, and cannot simulate the actual scene signal unique t...

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Problems solved by technology

[0002] Radar detection is based on the principle of the emission of electromagnetic waves and the reflection of objects on electromagnetic waves. The azimuth of the object is positioned by the difference in frequency and phase between the emission and reflection of electromagnetic waves. Since there are many reflectors of radar electromagnetic waves in the real environment, the reflection paths are intricate. Generally, signal generators and simulators can only generate some specific regular echo waveforms, and it is difficult for the simulated intermediate frequency signal to take into account the characteristics of the front-end signal such as the RF leakage of the RF front-end, and cannot simulate the actual scene signal unique to the radar, resulting in The radar parameters and detection performance obtained by simulation are quite different from the actual performance, which leads to inaccurate radar test results and poor anti-false scene effects. Therefore, it is necessary to further simulate and process the radar intermediate frequency signal to obtain an intermediate frequency signal that meets the requirements.

[0003] At present, the intermediate frequency signal analysis method commonly used in radar debugging is to collect the data of the entire detection section in the outdoor scene for analysis, adjust the parameters such as the amplifier and filter according to the analysis results, and then use the modified hardware device to collect data in the outdoor scene again, and cycle many times until The amplitude-frequency characteristics of the radar signal in the entire detection section are relatively good. This kind of multiple cycle debugging and acquisition can generally achieve relatively good amplitude-frequency characteristics, but it requires a lot of manpower and material resources, and also affects the time to market the product , especially for medium and long-distance detection radars, additional site restrictions often make debugging more tortuous

[0004] The actual IF echo signal of the radar has a great relationship with the environment. The IF signals at different distances in different environments and in the same environment are all changing. An important function of the IF signal analog processing is to connect the radar RF front-end and the digital processing front-end bridge. Maximize the signal-to-noise ratio of the required signal, reduce the signal-to-noise ratio of the virtual scene or unnecessary signal in the environment, and provide a suitable amplitude-frequency characteristic curve, while the above-mentioned traditional intermediate frequency signal generation system can only generate a fixed, full detection distance It is difficult to meet the needs of radar IF signal simulation processing with a single signal inside. At the same time, as mentioned above, in order to realize radar debugging, it is necessary to collect the data of the entire detection section in the outdoor scene, and perform multiple cycles of debugging and collection until the radar signal in the entire detection section The amplitude-frequency characteristics are relatively good, the operation is complicated, and the cost is high and the efficiency is low

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