Research on optimal band selection algorithm in bandwidth synthesis

Abstract

In radio astronomy observation, using bandwidth synthesis technique, the observation precision can be improved under limited record bandwidth. The optimal band selection is one of the key problems in bandwidth synthesis. In this paper, the mathematical model of the band selection is established, and the essence of optimal band selection is pointed out, and the optimal band selection algorithm is studied. Aiming at the shortcoming of the conventional method, the genetic algorithm and simulated annealing algorithm are respectively used, and finally a new band selection method based on the genetic simulated annealing algorithm is proposed, combining the two algorithms. Simulating experiments results show that the genetic simulated annealing algorithm is obviously better than the above three method, and has better robustness.