5 results about "Fire-control radar" patented technology

This invention discloses a multi-frequency, multi-target range-velocity deambiguation method and system based on phased array fire control radar, mainly addressing the low accuracy of existing methods in handling multi-target ambiguity. The implementation scheme is as follows: acquiring measurement points from the phased array fire control radar and generating a full-space candidate point set; discretizing the range-velocity plane into a grid, counting the number of candidate points and non-repeating frequency groups within each grid block; dividing the grid into blocks based on block-level neighborhood statistics to generate the candidate point set; calculating the unique frequency support number of the candidate point set and performing clustering to obtain candidate point clusters; statistically estimating the candidate point clusters, outputting target range and velocity estimates, forming the deambigued target set for the current frame. This invention can reduce the probability of false clustering structures formed by erroneous unfolding points, clutter points, and false alarm points, improving the accuracy and real-time processing efficiency of multi-target range-velocity joint deambiguation in complex scenarios, and can be used for multi-target signal processing and target tracking in phased array fire control radar.

The present application relates to airborne fire control radar technical field, disclose a kind of swash plate machine phase scanning radar installation angle self-adapting correction method, respectively obtain the target angle before and after radar array rotation, according to the target angle before and after rotation, respectively calculate the geographic system target angle centroid before and after rotation, and predict the predicted angle of target after rotation;Convert the geographic system target angle centroid to radar system, calculate the installation angle correction value;Real target angle is calculated using the installation angle correction value updated installation angle.The present application can be through the change of target angle in the process of long-distance target tracking with servo angle to deduce servo actual angle deviation, improve target tracking precision by real-time correction this deviation.

The application relates to the technical field of radar scanning system identification, and discloses an airborne fire control radar scanning system identification method and system. The method adopts a quadratic polynomial to fit a search envelope of a target radar, calculates a fitting error by using a model obtained through fitting, and finally compares the fitting error with a set threshold value to determine the scanning system type. The application solves the following problems existing in the prior art: under a complex environment, signal measurement error is increased or there are more pulse losses.

The present application relates to airborne fire control radar technical field, disclose a kind of electronic warfare angle measurement ambiguity confirmation method based on radar beam, first according to the phase difference of obtaining angle measurement element receiving echo, the phase angle transformation relationship is used to accurately solve target angle, to the angle of part existing phase ambiguity, using radar and with protection beam to suspected angle target is again detected signal, confirm whether target truly exists in the angle, eliminate angle ambiguity, judge the actual target angle, to realize accurate angle measurement.The method is not restricted by antenna size and other hardware conditions, the implementation method is more feasible, and the calculation method is simple, under the premise of not affecting the normal work of radar, can realize active detection to the initially estimated target angle, more real-time.

This invention provides a land-sea separation method and system based on radar echoes, relating to the field of radar signal processing. The method includes: when detecting the sea using a carrier fire control radar, coarsely locating the land segment using a digital map; then, based on radar echo information, statistically analyzing the average clutter power information of the land and non-land segments, setting a search threshold, and searching forward and backward for the start and end distances of the coarsely located land segment to obtain precise land segment information. This achieves the technical effect of eliminating the impact of inaccurate land-sea separation processing on target detection and reducing false alarms in carrier fire control radar detection of the sea. It solves the technical problems of high computational complexity, large real-time processing workload, and low accuracy and reliability of results in existing land-sea separation algorithms.