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The commercial interest in proximity services is increasing. Application examples include location-based information and advertisements, logistics, social networking, file sharing, etc. In this paper, we consider positioning of devices based on time series proximity reports from a mobile device to a network node. This corresponds to nonlinear measurements with respect to the device position in relation...
This paper presents a novel 7-in capacitive touch panel (CTP) system with a smooth tracking algorithm that accurately estimates the position where the panel is touched and tracks the trajectory of touch. The proposed CTP system consists of a microcontroller unit, a sensor IC, and an interface board. When a user draws at different speeds, the measurement noise caused by the sensor IC induces an error...
Traditional linear time-invariant (LTI) control design assumes that measurements are taken at regular time intervals and have independent additive noise. A common practical case that violates this assumption is the use of encoders that give quantized position measurements; when the quantization is appreciable the measurement noise is far from LTI. This paper develops a simple event-based controller...
In Visible Light Communication (VLC) each LED's on-off status can be recovered only after its projected position in each measurement frame is determined. Finding the LED projection is not straightforward since: 1) Clutter and noise corrupt the measurements; 2) When the LED is turned off, its position cannot be extracted by evaluating the intensity value of each pixel. Herein, a new method based on...
The trajectories of mobile seeds have a great influence on localization accuracy and efficiency. This paper presents a novel information-driven intelligent mobility-assisted wireless sensor network localization algorithm. Without requiring any prior knowledge of the sensing field, seeds' or pseudo-seeds' (common sensors which have been positioned) trajectories are scheduled dynamically aiming at position...
A common problem in the evaluation of Pedestrian Dead Reckoning (PDR) algorithms is the determination of a good ground truth. Some authors propose the use of external motion capture systems, however, their setup, complexity, synchronization and limited coverage are important limitations. We propose the generation of a simulated IMU signal for pedestrians, that is obtained from a given 3D trajectory...
In this paper, a new sensor system for sensing the trajectory of a golf ball is proposed. The proposed system has simple structure, four horizontal sensing lines, so it has low costs in manufacturing and maintaining the sensor compared to others. It extracts raw data from the ball and the club and passes them to the personal computer that has more computing power compared to the sensor itself. Raw...
This paper illustrates the basic concept and architecture of relative navigation in TDLS and a relative navigation simulation platform which is used as a basic test bed of TDLS. The simulation platform allows users to determine the simulation condition through GUI and makes it possible to generate the trajectories and TOA measurement according to a given mission. Using the designed platform, the effects...
Positioning solutions in infrastructure-based wireless networks generally operate by exploiting the channel information of the links between the Wireless Devices and fixed networking Access Points. The major challenge of such solutions is the modeling of both the noise properties of the channel measurements and the user mobility patterns. One class of typical human being movement patterns is the segment-wise...
This paper studies the effects of local coordinate translations on the performance of the bearings-only total least squares (TLS) target tracking algorithm. The TLS estimator has been proposed to alleviate the severe bias problems associated with the traditional pseudolinear estimator. In the passive localization context the bias of the TLS estimator was shown to be sensitive to shifts of the origin...
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