نتایج جستجو برای: تکنیک tdoa

تعداد نتایج: 28207  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده برق 1393

مکانیابی منابع الکترومغناطیس، آکوستیک و امواج ارتعاشی بوسیله ی سیستم های آرایه ای غیرفعال کاربردهای فراوانی در سیستم های موقعیت یابی، مسائل دفاعی، ژئو فیزیک و بالخصوص اخیرا در صنعت داشته است. چندین تکنیک در مکانیابی رادار غیرفعال وجود دارند که از جمله آن ها می توان به تکنیک های rss، aoa و tdoa اشاره کرد. در این میان تکنیک tdoa به لحاظ در نظر گرفتن دو پارامتر دقت و سادگی، در مجموع دارای وضعیت ب...

2012
Youssef Oualil Friedrich Faubel Dietrich Klakow

In this work, we address the problem of tracking an acoustic source based on measured time differences of arrival (TDOA). The classical solution to this problem consists in using a detector, which estimates the TDOA for each microphone pair, and then applying a tracking algorithm, which integrates the “measured” TDOAs in time. Such a two-stage approach presumes 1) that TDOAs can reliably be est...

2013
Mladen Veletić

This paper presents a novel Time Difference of Arrival (TDoA) estimation algorithm for mobile station positioning in Universal Mobile Telecommunication System (UMTS) based on cell search procedure defined by 3GPP. Standardized method for Time Difference of Arrival (TDoA) measurement and cell search procedure are stated. Furthermore, proposed solution for TDoA parameter estimation via multichann...

2013
Hesham Ibrahim Ahmed Ping Wei Imran Memon Yanshen Du Wei Xie

Time difference of arrival (TDOA) technology has been widely used in positioning and navigation system recently. The position estimation of a source through determining time difference of arrival (TDOA) of its signal among distributed sensors has many applications in civil as well as in the military. According to civil aspect, in mobile communication is widely used TDOA to perform location of c...

2002
Dirk Bechler Kristian Kroschel

Microphone arrays can be employed for passive acoustic source localization using time difference of arrival (TDOA) estimates in microphone pairs. The most common method for this TDOA estimation is the generalized crosscorrelation (GCC) method which is also used in this work. In an office room environmental noise influences and reverberation effects complicate the TDOA estimation and aggravate a...

2010
Regina Kaune

This paper investigates passive emitter tracking using a combination of Time Difference of Arrival (TDOA) measurements with further different types of measurements. The measurements are gained by exploiting the signal impinging from an unknown moving emitter. First, a combined set of TDOA and Angle of Arrival (AOA) measurements is processed using the Maximum Likelihood Estimator (MLE). Then, a ...

Journal: :IEEE Trans. Wireless Communications 2002
Li Cong Weihua Zhuang

This paper proposes a mobile user location scheme for wideband code-division multiple-access (CDMA) wireless communication systems. To achieve high location accuracy and low cost of the mobile receiver, the location scheme combines the time difference of arrival (TDOA) measurements from the forward link pilot signals with the angle of arrival (AOA) measurement from the reverse link pilot signal...

2015
J. Mar S. R. Wu Y. T. Wang K. C. Tsai

The robust three-dimensional position architecture is proposed in the paper, where the hybrid time difference of arrival (TDOA) and direction of arrival (DOA) position system was designed to backup the four-station TDOA position system. The digital time delay estimation (TDE) receiver is used for TDOA measurement and the cylindrical array antenna is used for DOA measurement. The general formula...

2012
Xiaomei Qu Lihua Xie

For the purpose of source localization, we have proposed a constrained weighted least squares (CWLS) source localization method in our companion paper, which uses static sensors by accounting for random uncertainties in sensor positions. This paper is devoted to developing two recursive algorithms to deal with the source localization problem by using time difference of arrival (TDOA) measuremen...

2015
Honggang Wu Yong Tang Xingbo Li

An airport surface multilateration system based on the time difference of arrival (TDOA) positioning principle establishes equations to calculate the position of target through utilizing the TDOA of targets’ answering signals to the ground receiving stations. The fault with any ground receiving station will result in a significant measuring error of signal’s arrival time and have a lethal impac...

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