Multi-target adaptive tracking method for mimo radar based on variable analysis time

Abstract

The invention belongs to the field of communication, and specifically provides a MIMO radar multi-target adaptive tracking method based on variable analysis time to realize MIMO radar adaptive target tracking in a multi-target environment; firstly, each target is determined by using the prediction error covariance threshold method Select the minimum value as the next analysis time of the MIMO radar; then traverse the combination of controllable parameters consisting of the working mode, the number of sub-arrays and the waveform energy, and judge whether it can satisfy the detection probability and beam Pointing constraints, thus forming a feasible set of MIMO radar control vectors; finally, under each control vector in the feasible set, the optimal radar control vector is obtained according to the principle of the lowest resource consumption. In a multi-target environment, the present invention gives full play to the advantages of MIMO radar using a single beam to irradiate multiple targets, increases the sampling times for each target, and adaptively determines the sampling time of the target according to the target motion characteristics, effectively improving the utilization of radar time resources Rate.

Description

technical field [0001] The invention belongs to the communication field, relates to MIMO radar technology, and specifically provides a MIMO radar multi-target adaptive tracking method based on variable analysis time. Background technique [0002] MIMO radar is a new system radar widely researched and developed at present. MIMO radar can flexibly divide the array antenna into sub-arrays, so that it can transmit either wide beam with low gain or narrow beam with high gain. Therefore, MIMO radar has better performance than other radars in terms of interference suppression, target detection performance and target parameter estimation performance. In order to effectively allocate various resources of MIMO radar, match the radar system resources with the entire task load, and fully utilize the radar performance, it is necessary to implement effective scheduling management for MIMO radar. For MIMO radar, its flexible and variable number of sub-arrays makes the radar transmit beam ...

AI Technical Summary

Problems solved by technology

[0006] Research on MIMO radar adaptive target tracking is still in its infancy, with few research results, and most of them are tracking resource management in single target scenarios; however, due to the wide span of MIMO radar beam width, multiple targets can be irradiated simultaneously by a single beam. Targets have more advantages in the context of multi-target tracking, so the present invention proposes a MIMO radar adaptive target tracking algorithm in a multi-target environment, which determines the analysis time of each target according to the motion characteristics of the target, and combines the MIMO radar at each analysis time The working mode, sub-array division and waveform selection are used to allocate the time-energy resources of the radar system. At the same time, the radar resource consumption is considered, and the optimal parameter set is obtained by minimizing the radar resource consumption.

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