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In this paper, a joint synchronization and Doppler scaling factor estimation algorithm has been proposed for underwater acoustic communications. The training sequence, which consists of two Zadoff-Chu (ZC) sequences being conjugate with each other, is utilized to synchronize and estimate Doppler scaling factor, time delay and carrier frequency offsets (CFOs). ZC sequences are well designed to show...
We address two important issues in causal discovery from nonstationary or heterogeneous data, where parameters associated with a causal structure may change over time or across data sets. First, we investigate how to efficiently estimate the "driving force" of the nonstationarity of a causal mechanism. That is, given a causal mechanism that varies over time or across data sets and whose...
We consider tracking of a target with elliptical nonlinear constraints on its motion dynamics. The state estimates are generated by sensors and sent over long-haul links to a remote fusion center for fusion. We show that the constraints can be projected onto the known ellipse and hence incorporated into the estimation and fusion process. In particular, two methods based on (i) direct connection to...
Map matching, as one of the key steps, is widely used in navigation, estimation of traffic flow, path planning, etc. With the emergency of large traffic track data, the demand for matching speed is becoming higher and higher. This paper describes a method of map matching based on grid index, which is used to quickly get the closest K candidate sections to improve the speed of map matching. When establishing...
The equivalent circuit parameters of an interior permanent magnet synchronous machine (PMSM) vary under different operating conditions due to magnetic saturation and temperature rise. Knowledge of accurate machine parameters is of paramount importance for high performance PMSM control and condition monitoring. Therefore, this paper presents a novel parameter estimation method, which employs both the...
Software Defined Networking (SDN) enables a centralised entity - the controller - to monitor the network’s status by collecting traffic statistics such as packets, bytes, etc. Each statistic is associated with a forwarding table entry (FTE) in a switch whose structure and format is specified by the OpenFlow standard (de-facto SDN standard). For a flow with a FTE, its statistic is easily...
A novel algorithm is proposed for the direction-of-arrival (DOA) estimation of coherently distributed (CD) sources. Based on the symmetric property of the uniform linear array (ULA) geometry, the DOA can be estimated by a one-dimensional peak search without estimating the distribution parameters, where N independent CD sources can be distinguished with a ULA of 2N + 1 elements. Compared with the existing...
This article provides an overview of modern methods and approaches to scientific and technological solutions' efficiency assessment. Much attention is paid to the problems of the criteria set formulation and the identification of their optimal structure for solving the stated problem. In the paper, based on practical results, the analysis of the effectiveness of scientific and technical solutions,...
Accurate information of permanent magnet (PM) flux linkage is of significance to high-performance control and condition monitoring of permanent magnet synchronous machines (PMSMs). During machine operation, the PM flux linkage can vary due to temperature rise and saturation. Thus, this paper investigates how temperature rise and saturation influence the PM flux linkage under different operation conditions...
As a manner of communications with the high spectral and energy efficiency, cognitive underwater acoustic communications based on index modulation (CUAC-IM) have been investigating by us in more recent years. Like other communication system, estimation algorithm on frequency offset (FO) caused by the relative motion of mobile station is crucial to CUAC-IM system. In this paper, system model, especially...
This paper discusses the problem of angle estimation for bistatic multiple-input multiple-output (MIMO) radar in the presence of spatial colored noise. The spatial colored noise is eliminated by exploiting the temporal uncorrelated property. Thereafter, a propagator method is considered for joint direction of departure (DOD) and direction-of-arrival (DOA) estimation. The proposed method does not require...
Fault detection method using k nearest neighbor rule has shown its advantages in dealing with nonlinear, multi-mode, and nonGaussian distributed data. Once a fault is detected in industrial processes, recognizing fault variables becomes the crucial task subsequently. Recently, the method of fault variables recognition using k nearest neighbor reconstruction (FVR-kNN) has been reported. However, the...
In this paper, a novel trace norm minimization optimization method for Direction of arrival (DOA) estimation is proposed under array element failure case. In the proposed method, we design a selection matrix according to the positions of failed elements firstly. Utilizing low rank structure of the covariance matrix and covariance fitting criteria, a convex optimization problem is proposed to reconstruct...
The understanding of power system characteristics and their impact on system behavior can lead to improved dynamic performances. Based on the Center of Inertia (COI) concept, this paper presents a practical study on the inertia distribution estimation, which can be used to both planning in long time scale and operation in short time scale, to meet with increasing renewable integration level in the...
Simulating/Measuring the jitter tolerance of clock and data recovery (CDR) circuits, and confirming if the associated jitter tolerance meets the required specification for a specified communication standard, is an important consideration for designing/testing high-speed serial link interface circuits. However, conducting such performance evaluations are costly and time-consuming. In this paper, a...
The pulse-echo method based on transmission of an ultrasonic pulse and time-of-flight determination of a reflected echo is one of the typical methods of ultrasonic distance measurement. To improve the SNR of the reflected echo, pulse compression using an M-sequence is employed in the pulseecho method. In the case of a moving object, however, the echo is modulated owing to the Doppler effect The Doppler-shifted...
Estimating short-term power load is a fundamental issue in the power distribution system. Since short-term power load is related to many parameters such as weather conditions, and time. The aim of this study is to determine the relevant parameters in estimating short-term power load not only in order to decrease the computational cost, but also to achieve higher success rates. Furthermore, by using...
This paper explores the correlation between the low-frequency content of customers' consumption load, measured by a proposed index called predictability index, and the accuracy of Customer Baseline Load (CBL) estimation methods. The customer's consumption signal is transformed from time-domain to frequency-domain to separate its high- and low-frequency components. After reconstructing the time-domain...
This paper proposes a real-time identification method for auto-regressive with exogenous inputs and state-dependent parameters (ARX-SDP). This model is always non-linear. We conveniently adapt Young's off-line approach to an real-time approach with reduced computational cost. Young's approach focuses on discovering state-parameter dependence. This implies to unveil the nonlinear structure of the system...
This paper proposes a method for a real-time classification of the absolute driving style using three levels of sportiveness: calm, normal and sporty. The algorithm is based on a physical gg-plot-based approach and on a novel manouvre detection algorithm. The method makes use of standard vehicle signals which can be also provided by an external IMU+GPS system. Experimental results show the effectiveness...
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