sensor placement to improve the positioning performance based on angle of arrival (aoa)传感器位置提高定位的性能基于到达角(aoa).pdfVIP

Wireless Engineering and Technology, 2010, 1, 41-45 41 doi:10.4236/wet.2010.11007 Published Online July 2010 (http://www.SciRP.org/journal/wet) Sensor Placement to Improve the Positioning Performance Based on Angle of Arrival (AOA) Behzad Omidali, Seyed Ali-Asghar Beheshti Shirazi School of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran. Email: behzad.omidali@, abeheshti@iust.ac.ir Received March 20th, 2010; revised July 12th, 2010; accepted July 19th, 2010. ABSTRACT In this paper, a method for sensor placement to improve the placement quality based on angle of arrival of signal in a specific area is proposed. The installation place of sensors may be constrained with specified boundaries. In this method, the criterion of maximum quality of placement is the Cramer-Rao bound. The generalized pattern search as an effective method is used to maximize error bound of the placement problem by angle of arrival. Better results are ob- tained in comparison with results of genetic algorithm. The derived results are compared from two aspects of run time and result quality. Keywords : Sensor Placement, Positioning, Cramer-Rao Bound, Numerical Optimization 1. Introduction fine and measure the positioning quality. These criterions might be related to average, maximum or cumulative Positioning based on receiving and processing of radio density function (CDF) of error in the considered area. signals has military, communication, navigation and even After defining the quality criterion, a method to calculate biologic application in the today world. Thus, study of it must be proposed. For this