A Task Scheduling Algorithm for Phased-Array Radar Based on Dynamic Three-Way Decision

• Published in: Sensors (Basel, Switzerland) Vol. 20; no. 1; p. 153
• Main Authors: Li, Bo, Tian, Linyu, Chen, Daqing, Han, Yue
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 25.12.2019; MDPI
• Subjects: Algorithms; comprehensive priority; Deadlines; Decision theory; phased-array radar; Radar; Scheduling; task scheduling; three-way decision; comprehensive priority; task scheduling; phased-array radar; three-way decision
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s20010153

The time resource management of phased-array radars is the key to fulfilling their performance, such as how phased-array radar can efficiently and reasonably schedule tasks under limited resources. Therefore, this paper proposes a task scheduling algorithm for phased-array radar based on dynamic three-way decision. The algorithm introduces three-way decision into the scheduling algorithm and divides the target into three threat areas according to the threat degree (i.e., threat area, nonthreat area, and potential threat area). Different threat domains are assigned different weights and combine the working mode and the task deadline to carry out comprehensive priority planning, so that the radar can reasonably allocate time according to the difference of the target threat level and the threat area in the tracking stage. In addition, an improved adaptive threshold algorithm is proposed to obtain a dynamic three-way decision to achieve the adaptation of the algorithm. A set of performance indicators have been defined to evaluate the algorithm. The relevant experiments have demonstrated that the proposed algorithm can effectively improve the processing capability of phased-array radars when dealing with high-threat targets.