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The concept of transform sensing was recently proposed to operate radars which consist of multiple antenna elements, for high efficiency and resolution. Using transform sensing, phase delays between and amplitudes of elements are no longer constant as in conventional phased array radars. The purpose is to produce any type of spatial sensing pattern that can be applied to the space for efficient sensing...
We address the problem of locating multiple sources from the Euclidean distance matrix (EDM), which can be obtained from the received signal strength or time of arrival measurements. In EDM-based localization, EDM is usually corrupted by some inevitable factors, such as non-line-of-sight propagation, hardware failures, and strong interference. Note that EDM is a low-rank matrix but not a positive...
A distributed energy detection scheme that exploits the spatial-temporal correlation is proposed for heterogeneous cognitive radio (CR) sensor network. We first use the weighted centroid algorithm to localize the position of the PU. Then according to the localization result, selective measurement combining for weighted average consensus is adopted to fuse the energy detection outputs of only homogeneous...
This paper proposes a hardware implementation of new method for speed sensorless control of surface mounted (SM) permanent magnet synchronous motor (PMSM) drive. It adopts combination of the DC link measurement and the modified model reference adaptive scheme (MRAS) to estimate rotor speed and position. A 16-bit dsPIC33EP256MC506 DSC is used to implement the proposed estimation algorithm and the control...
Power grids by their nature occupy a large geographical area, and any robust, intelligent control system for these grids needs to be distributed as well. Moreover, the increase in both the number and types of intelligent power consumer devices and the number and variation in renewable power sources presents new challenges and opportunities for more intelligent control. In this paper, the authors use...
Spectrum sensing is an essential concept in Cognitive Radio (CR) systems. It exploits the inefficient utilization of radio frequency spectrum without causing destructive interference to the licensed/primary user communication. In recent past, most of the studies on spectrum sensing are focused on cooperative/multinode detection approaches. However, they are confined to the detection of signals in...
With the availability of the off-the-shelf quadrocopter platforms, the implementation of autonomous unmanned aerial vehicle (UAV) has substantially been simplified. Such UAVs can explore unaccessible terrain and provide information about the local situation in a specified target area. For the early development of an autonomous aerial vehicle, virtual integration of the system makes it possible to...
In this work, we investigate in a Hardware-in-the-Loop (HiL) approach to solve the problems and opportunities created by the control of large numbers (hundreds to thousands) of MEMS sensors and actuators. Using HiL simulation, one or several devices of the system are used instead of their simulated models. HiL simulation is supposed to achieve a highly realistic simulation of equipment in an operational...
It is extremely challenging to run controlled studies comparing multiple Augmented Reality (AR) systems. We use an AR simulation approach, in which a Virtual Reality (VR) system is used to simulate multiple AR systems. To investigate the validity of this approach, in our first experiment we carefully replicated a well-known study by Ellis et al. using our simulator, obtaining comparable results. We...
Cognitive radios are the advanced wireless systems that are used to intelligently access the scarce radio resource - the spectrum. Cognitive radios have ability to sense the ambience, spectrum usage, geo conditions and fuse these information to arrive at a spectrum decision which helps to access the network in a `smart', controlled manner. However, the incumbent licensed systems are not sure on the...
Todaypsilas vehicles include a complex network of programmable electronic control units with software components. A vehiclepsilas electric and electronic (EE) architecture has to be modeled in an early design phase to evaluate design alternatives. The tool PREEvision offers possibilities to model EE-architectures considering feature function networks, function networks, component networks as well...
Two-dimensional (2-D) directions-of-arrival (DOA) estimation is a key problem in array signal processing fields. To save hardware costs and avoid multidimensional search, Liu proposed an ESPRIT-like algorithm using cumulant. However, this algorithm still have non neglible drawbacks: (1) suffering losses of the array aperture and resultant fewer sources to be processed from an array of given sensor...
Recently mobile robots act in various situations such as disaster areas, office buildings, factories and homes. When these new mobile robots are released, they should be confirmed to work correctly and safety from evaluation. In this paper, we propose large-scale simulation environment of mobile robots on StarBED which is a large-scale networked testbed. By using the simulation environment, we could...
There are many economic and technical arguments for the reduction of the number of Electronic Control Units (ECUs) aboard a car. One of the key obstacles to achieve this goal is the limited composability, fault isolation and error containment of todaypsilas single processor architectures. However, significant changes in the chip architecture are taking place in order to manage the synchronization,...
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