A radar multi-target intermediate frequency simulation device

Abstract

The invention relates to a multi-target intermediate-frequency radar simulation device comprising a control module, an intermediate-frequency transmitting module, a simulation signal module, a noise and clutter module and a channel power dividing module. The control module provides parameter control; the intermediate-frequency transmitting module generates an intermediate-frequency signal and a deception pulse signal according to the waveform type and the deception frequency; the simulation signal module generates multiple intermediate-frequency simulation signals with specific size, distance and speed targets according to the number of simulation targets, Doppler of each target and the reflection area at the same time; the noise and clutter module generates specific noise and clutter signals according to the statistical characteristics, power and bandwidth of the noise and clutter signals; the channel power dividing module combines the intermediate frequency simulation signals and the noise and clutter signals, and then performs power division to form multiple channels which are then respectively subjected to gain control to form a multi-channel simulation signal. Simultaneous multi-target echo signal simulation of radars is realized, simulation of various radar noises and clutters is realized, and the device is simple in circuit, easy for integration, strong in universal portability and widely applicable to radar systems.

Description

technical field [0001] The invention relates to the technical field of radar target intermediate frequency simulation, in particular to a radar multi-target intermediate frequency simulation device. Background technique [0002] At this stage, radar has gradually been widely used in civil fields such as navigation, surveying and mapping, and meteorology from the initial military field. In the process of radar development and production, the testing of radar performance and indicators is essential. If we only rely on the traditional field test method, that is, using real targets such as aircraft or missiles to provide echo signals to the radar, it will not only consume financial resources, manpower and Material resources, poor flexibility, long development cycle, and easy to be affected by weather conditions make the measurement process complicated and difficult. At the same time, in order to measure some special properties of radar signals, it is necessary to provide comple...

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Problems solved by technology

The circuit is complex, and it is impossible to realize the simultaneous generation of multiple radar target intermediate frequency simulation signals, which greatly limits the system simulation performance. Moreover, the diode PN junction reverse breakdown is generally used, and the signal generated by the breakdown is amplified and filtered to generate noise and noise. Clutter signal, the statistical characteristics of the noise and clutter signal generated by this method are single, the stability is poor, and it is easily affected by environmental factors such as temperature. At the same time, due to the excessive amplification factor, there is a problem that the circuit is easy to self-excite

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