کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6952150 1451755 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Received signal strength based positioning for multiple nodes in wireless sensor networks
ترجمه فارسی عنوان
موقعیت سیگنال دریافت سیگنال برای چندین گره در شبکه های حسگر بی سیم
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
چکیده انگلیسی
We address the problem of locating multiple nodes in a wireless sensor network with the use of received signal strength (RSS) measurements. In RSS based positioning, transmit power and path-loss factor are two environment dependent parameters which may be uncertain or unknown. For unknown transmit powers, we devise two-step weighted least squares (WLS) and maximum likelihood (ML) algorithms for node localization. The mean square error of the former is analyzed in the presence of zero-mean white Gaussian disturbances. When both transmit powers and path-loss factors are unavailable, two nonlinear least squares estimators, namely, the direct ML approach and combination of linear least squares and ML algorithm, are developed. Numerical examples are also included to evaluate the localization accuracy of the proposed estimators by comparing with two existing node positioning methods and the Cramér-Rao lower bound.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Digital Signal Processing - Volume 25, February 2014, Pages 41-50
نویسندگان
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