Finite-Horizon Scheduling of Radar Dwells with Online Template Construction.
Journal
Proceedings of the 25th IEEE Real-Time Systems Symposium (RTSS 2004), 5-8 December 2004, Lisbon, Portugal
Pages
23-33
Date Issued
2004
Author(s)
Abstract
Timing constraints for radar tasks are usually specified in terms of the minimum and maximum temporal distance between successive radar dwells. We utilize the idea of feasible intervals for dealing with the temporal distance constraints. In order to increase the freedom that the scheduler can offer a high-level resource manager, we introduce a technique for nesting and interleaving dwells online while accounting for the energy constraint that radar systems need to satisfy. Further, in radar systems, the task set changes frequently and we advocate the use of finite horizon scheduling in order to avoid the pessimism that is inherent in schedulers that assume a task will execute forever. We also develop the notion of modular schedule update which allows portions of a schedule to be altered without affecting the entire schedule, thereby simplifying the scheduler. Through extensive simulations we validate our claims of providing greater scheduling flexibility without compromising on performance when compared with earlier work based on templates constructed offline. © 2004 IEEE.
Other Subjects
Energy constraints; High-level resource manager; Phased array radar systems; Radar dwells; Algorithms; Antenna arrays; Computer simulation; Constraint theory; Electromagnetic waves; Online systems; Probability; Radar tracking; Scheduling; Signal processing; Radar systems
Type
conference paper