tailieunhanh - Báo cáo hóa học: " A Self-Localization Method for Wireless Sensor Networks"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A Self-Localization Method for Wireless Sensor Networks | EURASIP Journal on Applied Signal Processing 2003 4 348-358 2003 Hindawi Publishing Corporation A Self-Localization Method for Wireless Sensor Networks Randolph L. Moses Department of Electrical Engineering The Ohio State University 2015 Neil Avenue Columbus OH 43210 USA Email Dushyanth Krishnamurthy Department of Electrical Engineering The Ohio State University 2015 Neil Avenue Columbus OH 43210 USA Robert M. Patterson Department of Electrical Engineering The Ohio State University 2015 Neil Avenue Columbus OH 43210 USA Email Received 30 November 2001 and in revised form 9 October 2002 We consider the problem of locating and orienting a network of unattended sensor nodes that have been deployed in a scene at unknown locations and orientation angles. This self-calibration problem is solved by placing a number of source signals also with unknown locations in the scene. Each source in turn emits a calibration signal and a subset of sensor nodes in the network measures the time of arrival and direction of arrival with respect to the sensor node s local orientation coordinates of the signal emitted from that source. From these measurements we compute the sensor node locations and orientations along with any unknown source locations and emission times. We develop necessary conditions for solving the self-calibration problem and provide a maximum likelihood solution and corresponding location error estimate. We also compute the Cramer-Rao bound of the sensor node location and orientation estimates which provides a lower bound on calibration accuracy. Results using both synthetic data and field measurements are presented. Keywords and phrases sensor networks localization location uncertainty Cramer-Rao bound. 1. INTRODUCTION Unattended sensor networks are becoming increasingly important in a large number of military and civil applications 1 2 3 4 . The basic concept is to deploy a large number of low-cost self-powered sensor .

TÀI LIỆU LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.