Consider the frequency synchronization in global niobile satellite coiiiniunications systems. Let fc ( n , %: t ) be the t,raiismitt,ed ca.rrier frequency from the SAN t o the i-th user in the n-th spot bea.m, D c ( t ) be the fractional Doppler of t.he feeder link, fc6 be t,he translation frequency at. t.he sat.ellit,e, J f ( t ) be the fractional satel1it.e translation error, atid D,(n , i , ...

In reverse engineering, reconstruction of 3D point cloud data is the key step to acquire the final profile of the object. However, the quality of 3D reconstruction is influenced by noise in the three-dimensional measurement. This paper aims to tackle the issue of removing the noisy data from the complex point cloud data. The 3D-GPF (Three Dimensional Global Phase Filtering) global phase filteri...

In this paper, a fast frequency domain global modal parameter identification algorithm is proposed. The modal parameters are identified with amplitude square of FRF instead of its traditional real part & imaginary part. By discrete transformation, all additional pseudo roots are reciprocal of the real roots and their conjugates. The physical roots can be separated from mathematical roots with s...

Radio frequency identification (RFID) systems, which basically consist of readers and tags, were originally developed for the identification of tagged objects, as the name RFID implies. Recently, precise positioning and tracking of RFID tags or readers has received considerable attention from both academia and industry. For example, finding the position of RFID tags is an important task in vari...

Road transportation injuries, environmental pollution, and wasted energy and time in traffic congestion cause considerable cost to society. Some examples are the $115 billion cost of United States traffic congestion in 2009 and its predicted $23 billion annual cost in Australia by 2020. Intelligent Transportation Systems (ITS) are increasingly being considered to mitigate these impacts. The ben...

Developing indoor positioning remains challenging, especially when we consider an emergency and disaster scenario wherein positioning infrastructures fail. In this case the objective consist in providing to first rescuers (firefighters) robust and reliable positioning under harsh conditions. Toward this goal, we present a navigation system, then, we survey the class of faults that threaten this...

As the ageing of population is getting worse in China, both people and society pay more attention to the support and nursing of the elderly, establishing many gerocomium and monitoring system for the elderly. The monitoring system mainly focuses on the real-time monitoring, however, it is still not accurate and promptly enough in aspects of nursing, quick response, and fixed position accuracy. ...

The continuous tracking of mobile systems via active or passive RFID is a desirable but difficult to achieve objective. In this paper, we present our experimental results of positioning techniques using passive UHF RFID, Bluetooth, and WLAN. We thereby employ three orthogonal measuring techniques: detection rates, signal strength, and round trip time. The orthogonality of the methods is designe...

This paper presents a new prototype framework of automated tracking and monitoring system for construction materials. Previous technologies such as RFID and GPS deployed in construction material tracking have been reviewed and signal strength-based localization has been examined. As an emerging network standard for industrial applications, brief specifications of ZigBeeTM protocol have been des...