دانلود مقاله ISI انگلیسی شماره 70731
عنوان فارسی مقاله

برآورد خطای محل در شبکه های ad hoc بی سیم

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
70731 2014 12 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Location error estimation in wireless ad hoc networks
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Ad Hoc Networks, Volume 13, Part B, February 2014, Pages 504–515

کلمات کلیدی
محلی سازی ؛ برآورد محل؛ CRLB؛ شبکه های حسگر بی سیم
پیش نمایش مقاله
پیش نمایش مقاله برآورد خطای محل در شبکه های ad hoc بی سیم

چکیده انگلیسی

Many ad hoc network applications rely on nodes having accurate knowledge of their geographic locations. However, inherent in all localization systems is a degree of error in computed positions, which can compromise the accuracy and efficiency of location dependent applications and protocols. We propose a scheme in which nodes estimate the amount of error present in their derived positions with a certain probability. Localization error variance is modeled with a function based on the calculated theoretical lower bound on estimator variance, given by the Cramér–Rao Lower Bound (CRLB). Probabilistic methods then use this variance model to estimate upper bounds on localization error, which are computed locally by wireless devices. Best fits between the model and the actual location error variance using both time of arrival (TOA) and received signal strength (RSS) distance measurements were determined by a least squares estimator over repeated localization simulations. The proposed method was used to accurately estimate location error at given probabilities in a multitude of randomly generated network topologies within ±10% of the actual localization error. Once known, estimates can be integrated into location dependent schemes to improve on their robustness to localization error.

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