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In this paper, we propose a tracking mechanism for the residual sampling clocking offset (SCO) with corresponding pilot and auxiliary pilot arrangements for filter bank multi-carrier (FBMC) offset QAM (OQAM) baseband receiver in the 60 GHz band. This work can effectively compensate the non-ideal effects on the high-band subcarriers while using more data subcarrier for increasing bandwidth efficiency...
As more knowledge is vastly added to the devices fuelling the Internet of Things (IoT) energy efficiency and real-time data processing are great challenges that must be tackled. In this paper, we introduce ADMin, a low-cost IoT framework that reduces on device energy consumption and the volume of data disseminated across the network. This is achieved by efficiently adapting the rate at which IoT devices...
We introduce in this paper two main approaches, Triangulateration (TL) and Angle-Difference-of-Arrival (ADoA) for indoor localization and mapping using single-anchor and millimeter wave (MMW) propagation characteristics. Then, we perform context inference through obstacle localization. To do so, we first include and estimate the positions of virtual anchor nodes (VANs), known as mirrors of the real...
As wind energy continues to expand to new frontiers in terms of the location, number, and size of wind turbines, the industry has begun to seek smarter operations and management solutions. Wireless sensing nodes could provide a low-cost platform to support a variety of applications designed to reduce the levelized cost of energy and increase the safety of wind turbines. However, a wireless sensor...
In the last few years, there has been a growing interest in developing sensing systems using RF signals of opportunity, especially exploiting radar-based techniques. Long Term Evolution (LTE) signals are excellent candidates as signals of opportunity thanks to their wide availability and penetration in indoor environments. This is the first work investigating the possibility to use LTE signals for...
In this paper we analyze the performance of a full-duplex relay system in the presence of residual self-interference (SI) and frequency-selective fading. In particular, the residual SI channel estimation performance is evaluated both analytically and via simulation. The bit error rate (BER) performance at the destination is also characterized via simulation. Two schemes are considered for the equalization...
This work presents an algorithm to improve the estimation of the position in indoor environments when using an Ultrasonic Local Positioning System (ULPS). This system is composed of several beacons, with an encoded transmission based on 255-bits Kasami sequences and a BPSK modulation. The received ultrasonic signals are processed to determine the time of arrival (ToA) for every beacon. The differences...
In this paper, we propose a real-time classification scheme to cope with noisy Radio Signal Strength Indicator (RSSI) measurements utilized in indoor positioning systems. RSSI values are often converted to distances for position estimation. However due to multipathing and shadowing effects, finding a unique sensor model using both parametric and non-parametric methods is highly challenging. We learn...
A particular problem in satellite communications is the estimation of the current operating point of a bent-pipe transponder. Various special effects aggravate this estimation problem, among which the capture effect, gain compression, unknown attenuation in the transmission channel, or noisy received signals are the most prominent. In most practical cases, operators desire a fully blind estimator...
A decentralized bilateral teleoperation system is studied in this paper by using estimators with task abstraction. There is only a part of mobile robots in the multi-robot system can receive the human command via the master robot located in the local side. By exchanging information through a undirected and connected graph, mobile robots in the network have to estimate the human command and the global...
For realization of ITS (Intelligent Transport Systems) world, location information is one of important information because the accuracy of the position decides the quality of ITS services. Kinematic positioning has been attracting attention as a high-precision position estimation method of moving objects. However, the acquisition rate of FIX solutions fluctuates according to positioning parameters...
Considered as the free accessible and suitable solution for positioning in urban areas, Global Navigation Satellite Systems (GNSS) have been widely used these recent years in a wide spectrum of applications. However, signal blockage, non-line-of-sight (NLOS) multipath interferences and signal degradation affect the system performance and represent the major hurdles of GNSS in it course of adoption...
Satellite navigation is very widespread in civil society; many devices and services exploit this technology and several systems are in use or in development phase. GNSS receiver, embedded in devices used in daily life (smartphones, cars and so on), works in several conditions and operational scenarios. Ensuring good positioning accuracy is challenging, especially in environment where receiver measurements...
This paper describes an open source analogue to digital converter designed to meet the requirements of power system waveform measurement. In particular, attention is given to ensuring that waveforms are synchronously sampled to maintain the relationship between the various observed quantities, and the system is synchronized to the UTC time base by means of a GPS receiver, making a wide area comparison...
A remote-state estimation system consisting of a sensor and an estimator is considered. The sensor observes a scalar Gauss-Markov process and at each time determines whether or not to transmit the state of the process. The transmission takes place over a packet drop channel. Previous results have established that the optimal transmission strategies are threshold based and optimal estimation strategies...
There are numerous uses of Global Navigation Satellite Systems (GNSS): navigation, of course, but also various optimizations, such as routing or handover protocols in telecommunication networks. Moreover, energy saving approaches may also be based on the use of the locations of the various entities involved. Most of the time, the positioning is considered to be “perfect”: no uncertainty on the values,...
For Wireless power transfer with multi-pickup, cross coupling among multi receivers is an inevitable problem which will greatly influence the system performance. Due to its complexity, there is not one identification method yet. This paper proposes a cross coupling-coefficient estimation method, only the primary current is need to be detected. By decoupled one secondary pickup circuit, the mutual...
Extended Kalman Filter (EKF) can not only be used for tracking L1 signal under high dynamic, but also combine with semi-codeless techniques to track high dynamic L2 signal. And EKF can hold stability lock with semi-codeless in the ionospheric scintillation. The method of maximum a posteriori (MAP) estimation is used to estimate the unknown W-bit to overcome anti-spoofing (AS). EKF based semi-codeless...
This paper presents a novel tightly INS/GPS integration algorithm for altitude estimation. The altitude estimation is independent to provide accurate Euler angles for INS system, and magnetic sensors reduce the growth-rate of navigation-errors. In this paper, a tightly INS/GPS model is built with 23 state variables; bias and scale factor of IMU are estimated to correct INS system; and PVT information...
Ground-Based Augmentation System (GBAS) allows high-precision aircraft landing based on Global Navigation Satellite System (GNSS) at large airports. However, non-uniform spatial ionospheric delay needs to be determined. In this work, we compute the nominal ionospheric delay gradients around Suvarnabhumi airport, Thailand. The utilized techniques involve Kalman filter and LAMBDA method. Based on the...
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