39 results about "Radar countermeasures" patented technology

The invention provides a radar countermeasure equipment effectiveness evaluation method based on hardware-in-the-loop simulation. Electromagnetic environment simulation in a lab and a hardware-in-the-loop environment simulated by a countermeasure object are used, a corresponding countermeasure scene is set according to application conditions and performance requirements of different pieces of countermeasure equipment, and a real-time and radio frequency-level hardware-in-the-loop simulation experiment is developed; according to recorded information, a multi-dimension effectiveness representation model is used, and a countermeasure effectiveness evaluation result is obtained. The method of the invention is applied to the performance detection and evaluation design step in the current radar electron countermeasure equipment development, the electron reconnaissance ability and the electron interference ability of the electron countermeasure equipment in different complexity signal environments can be detected under the lab condition, and promotion roles can be played in research on electromagnetic signal environment adaptability of the electron countermeasure equipment, electron interference effectiveness in view of different radar threat objects, and research on the countermeasure technology.

The invention discloses a convolutional neural network based cooperative radar network track deception jamming discrimination method, and belongs to the technical field of radar countermeasure. Track deception jamming is a new mode of deception jamming special for networking radar, and has the characteristics of strong confusability and high discrimination difficulty; in practical engineering, signals and data information reported by radar stations are quite rich, and the existing method using single data layer characteristics for hard decision has the disadvantages of poor reliability in discrimination results and high false discrimination probability. In order to solve the problem, the method mainly includes the following steps: (1) calculating an identification characteristics parameter set; (2) selecting training and testing samples; (3) utilizing the training sample to train the network, and utilizing the testing sample to test the network. The method is applicable to centralized radar networks and high in correct identification rate of false tracks, and has high engineering application value and popularization prospect.

The invention discloses an unmanned aerial vehicle airborne radar confrontation simulation training system in the field of unmanned aerial vehicles. The system comprises a signal generation control and interference detection processing board, a phase locked loop, a first control transceiver switch, a pulse modulator, a first numerical control attenuator, a first power amplifier, a second control transceiver switch, an antenna, a second power amplifier, a second numerical control attenuator, a mixer, a filter and a third power amplifier. The system provided by the invention solves the problem that a confrontation simulation training signal system in the prior art lacks combat objects, cannot assess interference quality and cannot visualize a training process, and can be used in military training.

The invention relates to a multi-radar countermeasure method and system. The method comprises the steps of carrying out the frequency division of a received radar radio frequency signal, obtaining a frequency division intermediate frequency signal after the frequency division of the received radar radio frequency signal and a frequency division local oscillator signal, carrying out the frequency detection of the pulse front edge of the frequency division intermediate frequency signal, and obtaining a pulse starting frequency; performing broadband and narrowband judgment on the frequency division intermediate frequency signal of the radar signal to obtain a broadband and narrowband judgment result of the broadband signal or the narrowband signal; calculating the center frequency of the broadband signal for the broadband signal according to the broadband and narrowband judgment result; determining a local oscillation signal frequency range of the narrow-band signal according to the pulsestarting frequency and switching to the corresponding local oscillation signal according to the broadband and narrowband judgment result; for the broadband signal, determining the frequency range ofa local oscillation signal according to the center frequency of the broadband signal and switching to the corresponding local oscillation signal; and mixing the local oscillator signal and the radar radio frequency signal to generate an intermediate frequency radar signal, and generating a radar interference signal according to the intermediate frequency radar signal.

The invention relates to a radar countermeasure effectiveness optimized detection method. The method includes the steps that a subset comprising missing data indexes is determined, the weight coefficient of weighing generalized information entropy is calculated, and then the weighing generalized information entropy (namely original information entropy) of an initial subsystem is calculated; the searching starting point is determined, the step size in searching is set to add miniature section data so as to replace missing data, and the section lower limit of the missing data is determined and calculated; the section length is increased according to the step size, the weighing generalized information entropy at the global minimum position, the position where new information entropy is equal to original information entropy and the weighing generalized information entropy corresponding to the position are obtained, and the missing data is obtained through section judgment. The method of filling the missing data in a radar countermeasure effectiveness evaluating system is capable of improving the filling accuracy, well adaptive to a small sample data set and high in feasibility.