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Millimeter wave (mmWave) communication is favored for its abundant bandwidth. However, the sampling rate scales up with the large bandwidth, thus making it difficult to implement high-resolution analog-to-digital converters (ADCs). In addition, a large-scale array is employed to overcome the high path loss of the mmWave channels. Due to the large number of antennas and the directional feature of the...
Several UWB location systems have already been proposed for accurate position estimation. These UWB systems, some available at commercial level, and others implemented as laboratory test-beds, have been individually evaluated for particular applications and under different fusion strategies. In this paper we compare two commercially available UWB systems (Decawave and Bespoon) under exactly the same...
In this paper, we consider bandwidth efficient design and channel estimation over time-varying frequency-selective environments, where the basis expansion model (BEM) is used to describe the time-varying channel. Superimposed training based channel estimation based affine precoding model is designed, where the data interference is eliminated from received data prior to performing channel estimation,...
In this paper, qualification of the p-cascade tuned filter capacity estimation is presented for radio communication systems using multiposition phase-shift keyed signals with n-discrete states. It is shown that the capacity will be limited to the resolution time of linear systems that are present in the RCS linear radio-frequency section and that are an integral part of channel. The method of estimating...
In recent years, violence has considerably increased in the world. In a certain state of Brazil, for example, the homicide rate grew from 16 homicides per 100,000 inhabitants in 2000, to 48 homicides per 100,000 inhabitants in 2014. Police departments worldwide use various types of crime maps, which are generated with diverse techniques, in order to analyze and fight crime. Those types of maps enable...
The estimation of environmental contours of extreme sea states characterized by significant wave height and energy period for the purposes of reliability-based offshore design is a problem that has been tackled in many different ways. Many of the methods used to generate such contours rely on parametric approaches that require an a priori assumption of the relationship between the variables of interest...
Many wireless communication media (e.g., underwater acoustic and mm-wave radio channels) exhibit sparse impulse responses that can be exploited at the receiver using compressed sensing methods in order to reduce the pilot overhead required for channel estimation. The success of sparse recovery methods, however, heavily depends on whether the received samples admit an exactly sparse representation...
The Acoustic Vector Sensor can measure both pressure and particle velocity information of acoustic field at a point in space. By using the acoustic pressure and particle velocity information, a single AVS can get the unbiased estimation of target's bearing. But when the phase of each channel is inconsistent, the estimation precision will be badly affected. In order to solve this problem, this paper...
Hurricanes can cause significant damages to the electric power systems and result in widespread and prolonged loss of electric services. A preventive scheduling of available resources in response to these events can be of significant importance in reducing the related undesirable aftermath. An Event-driven Security-Constrained Unit Commitment (E-SCUC), as discussed in this paper, can be used as a...
Health monitoring is an important issue in recent aging society and is especially required at-home and at care facilities. Stepped-FM UWB sensor has recently attracted considerable attention for Wireless health monitoring since it obtains range profiles which has high range resolution. In this paper, the measurement scheme using a stepped-FM UWB sensor is suggested. Also, this scheme has problem that...
A large part of the data transmitted over the Internet today consists of video streaming services, mainly due to the growth of services like Youtube, Skype or WebEx. The need for an adaptive video stream arose as a mobile robot with real-time video streaming capability has been developed. ARC-ROVER is a robot that could connect to the Internet via 3G technology, and that could be controlled over the...
In this paper, an algorithm for accurate distance estimation of a vehicle to a road side unit (RSU) in urban multipath environments is presented. The algorithm is based on spatial filtering using a uniform circular array (UCA) antenna and a cross correlation based time delay detection. The time base for the cross correlation is built using Global Navigation Satellite System (GNSS) based positioning...
In the control of Interior Permanent Magnet Synchronous Machines (IPMSMs), Maximum Torque Per Ampere (MTPA) based on motor parameters is a common approach to achieve high efficiency and torque density. Parametric uncertainty (e.g. due to identification errors, magnetic saturation or temperature variation) results in undesired deviation from the optimal operating trajectory. To solve this problem,...
The junction temperature of power semiconductors in power converters must not exceed its maximum limits and it is of major importance for several failure mechanisms. But still, the junction temperature is hard to access. Direct measurement is not practical for industrial applications, indirect measurements require substantial effort and available junction temperature models have high calculation effort...
The estimation of spatial processes from sparse sensing nodes is fundamental for many applications, including environmental monitoring and crowd-sourcing. In this paper, we analyze the impact of measurement errors on the estimation of a finite-energy signal sampled by a set of sensors randomly deployed in a finite d-dimensional space according to homogeneous Poisson Point Process. The optimal linear...
In perceptual audio coders, the audio signal masks the quantization noise. The masking effectiveness depends on the degree of tonality/noisiness of the signal. Hence, in psychoacoustic models (PM) of perceptual coders, the level of the estimated masking thresholds can be adjusted by tonality estimation methods. This paper introduces three envelope analysis methods for tonality estimation: optimized...
Photoplethysmography (PPG) is a simple, unobtrusive and low-cost technique for measuring blood volume pulse (BVP) used in heart-rate (HR) estimation. However, PPG based heart-rate monitoring devices are often affected by motion artifacts in on-the-go scenarios, and can yield a noisy BVP signal reporting erroneous HR values. Recent studies have proposed spectral decomposition techniques (e.g. M-FOCUSS,...
HTTP adaptive streaming (HAS) technology has been widely implemented in entertainment industries. It allows users to smoothly access representations of content when the network work conditions frequently fluctuate. This mechanism not only improves the perceived quality of user but also benefits the network resource utilization. However, the frequent adaption of bit rate may cause the instability of...
Random forest cannot give accurate and calibrated posterior class probability estimates for its predictions. In this paper, we propose novel probabilities estimators combining random forests with kernel density estimation. Kernel density estimator can manage to obtain smooth non-parametric estimations of class probabilities, but fail to scale up to the high dimensional data. In order to apply kernel...
Recently, P2PTV is a popular application to deliver video streaming data over Internet network. On the overlay network, P2PTV applications create the logical links between pairs of peers considering round trip time (RTT) without physical network consideration. P2PTV packets are shared over a network without localization awareness which is the serious problem for Internet Service Providers (ISPs)....
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