A bistatic mimo radar tracking and positioning and spoofing jamming identification method

Abstract

The invention discloses a bistatic MIMO radar tracking and positioning and deceptive interference identification method, which belongs to the field of radar communication technology. The method first calculates the residual observation vector, and then uses a one-step prediction method to obtain the target measurement prediction value, and uses the prediction value to obtain The coefficient matrix of the residual equation system; then calculate the signal-to-noise ratio of the echo signal, and calculate the least squares weighted matrix; use the observation vector, the coefficient matrix of the residual error equation system and the least squares weighted matrix to calculate the residual value of the target coordinates, and combine the target The target coordinates are calculated from the coordinate prediction value; the fitting error vector is calculated by using the least squares weighted matrix and the residual observation vector, and then the detection statistic is obtained, and the detection statistic is brought into the detector, and the obtained value is compared with the detection threshold λ0 , if it is greater than λ0, it is spoofing interference, and if it is less than λ0, it is a real target. Therefore, it has the effects of strong practicability, high precision, ability to identify spoofing interference, small amount of calculation, and high real-time performance in the bistatic MIMO radar tracking process.

Description

technical field [0001] The invention belongs to the technical field of radar communication, in particular to bistatic MIMO radar anti-distance deception interference. Background technique [0002] Range spoofing is one of the most common active jamming modes. The jammer amplifies the detected radar signal, and then delays forwarding; the jamming signal enters from the main lobe of the radar, and uses false target distance information to act on the radar target detection and tracking system. Since the energy of the interference signal is greater than the real target signal, and it can obtain the same compression processing gain as the radar echo, it can induce the radar to detect or track it, so that the radar cannot correctly measure the parameter information of the real target, detect and track Performance is severely degraded. Therefore, it is very important to suppress the spoofing interference. In order to achieve this goal, it is first necessary to identify whether th...

AI Technical Summary

Problems solved by technology

Theoretically speaking, after using cutting-edge tracking technology, conventional radar can identify and implement effective countermeasures against distance deception jamming. However, the effect of actual countermeasures is not ideal. Is the signal at the front of the gate the target signal or general noise or side lobes of the compressed signal?

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