3 results about "Bistatic radar" patented technology

This invention discloses a method for estimating atmospheric errors in bistatic satellite-to-ground radar target detection using high- and low-frequency joint reception. The method first obtains a large-scale atmospheric delay estimate through multi-source data fusion and ray path integration to achieve coarse compensation; then, it extracts the residual atmospheric phase based on echo self-calibration to achieve fine compensation; finally, it combines high- and low-frequency constraints to achieve phase deambiguity and extract the absolute total atmospheric delay. From global modeling to local correction and cross-band consistency, it achieves accurate estimation of atmospheric delay errors along the propagation path.

The application relates to a KCF-TBD method based on a non-cooperative bistatic radar and belongs to the weak target tracking technical field of the non-cooperative bistatic radar. The application can realize detection and tracking of multiple weak targets on the basis of not depending on a motion model, and in view of the fact that in the actual scanning process of the passive bistatic radar, the capture of weak targets between frames is unstable, the KCF tracking frame is easily affected by strong clutter, errors of the tracking system itself and the like, and thus the problems of tracking frame drift and loss are caused, track prediction is carried out by using deep learning, the position of the KCF tracking frame is effectively corrected, and the stability of the tracking process is improved.

The application discloses a double-base radar space synchronization method based on clutter locking, which comprises the following steps: firstly, a double-base radar space synchronization model is established, model parameter initialization is completed, uniform sea clutter surface target echo is obtained, two-dimensional scanning is performed on the sea clutter area, echo filtering and uniformization processing are performed, the azimuth and pitch angle of the beam alignment moment are estimated, the irradiation target area is changed, multiple sets of alignment moment angles are obtained, a double-base relative position positioning equation is established, the position error of the transmitting station and the receiving station is introduced, the positioning equation is optimized and solved, the relative position of the double-base platform is obtained, the double-base beam angle is recalculated, and the double-base radar space synchronization is realized. Compared with the existing space synchronization method, the method does not depend on the precision of the aircraft platform inertial navigation system, effectively solves the problem that the double-base beam is difficult to realize space synchronization in the actual flight process in the actual working environment, and cannot use navigation information, and the inertial navigation system has a large cumulative error in the long-time flight process.