Research On Digital Array Radar Beam Dwell Scheduling Technology

Digital array radar is phased array radar that adopts digital beam forming for both receiving and sending.Compared with traditional phased array radar,it has advantages in detection accuracy,anti-interference,adaptability,etc.,thus leading the development of radar.In order to give full play to the operational effectiveness of digital array radars,effective resource management of system resources is required,and radar beam residency scheduling is an important part of it.This thesis focuses on the research of digital array radar beam dwell scheduling technology.First,it introduces the key factors that affect radar beam dwell scheduling In terms of priority design,the design methods based on single attribute and multi-attribute are explained respectively.And then template method and adaptive scheduling algorithm are introduced.Among them,adaptive scheduling methods can be further divided into methods based on scheduling interval analysis and time pointer analysis.Subsequently,the existing PAR scheduling algorithm and its shortcomings are explained.Aiming at the shortcomings of the existing algorithms,a new online pulse interleaving method is proposed,and combined with the traditional based on time pointer analysis method,an improved beam dwell scheduling algorithm in phased array radar is obtained.On this basis,its efficient algorithm is proposed.Then,study on the beam dwell scheduling in the traditional working mode of the DAR.Because of this method of processing echo data using digital beam forming,the antenna receiving antenna of the digital array radar can receive echoes of different transmit beams at the same time,so the radar can perform pulse interleaving with overlapping receiving durations.In order to realize the overlapping pulse interleaving of the receiving period,two vectors with variable length are introduced to represent the transmitting period state and the receiving period state of the task.After the task is scheduled,it is judged whether the transmitting and receiving state meets the constraint condition of no time conflict,and At the same time,the energy resource consumption constraints are judged.Combining the above-mentioned pulse interleaving analysis method with the traditional time-pointer-based beam dwell scheduling algorithm,a new digital array radar beam dwell scheduling algorithm is proposed.Finally,the problem of beam dwell scheduling under MIMO(Multiple Input Multiple Output)mode of digital array radar is studied.In MIMO mode,other tasks can be interleaved for the entire dwell time.Based on the pulse interleaving analysis method in the traditional working mode of the digital array radar,three two-dimensional matrices with variable lengths are introduced to represent the transmission period,reception period and energy status of different task numbers in the task sequence.Combining it with a scheduling algorithm based on time pointer analysis,an improved dwell scheduling algorithm in MIMO mode of digital array radar is proposed.