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Resistive crossbar arrays show significant improvement in terms of energy and area efficiency when compared to current SRAM based memory technologies. However, due to its resistive nature, it suffers from undesired current sneak-paths complicating read-out procedures. In this paper, we present a voltage-based reading technique in resistive memories. The simplicity of the readout circuit enables parallel...
LiDAR sensors play a crucial role in autonomous driving and advanced driver assistance systems. By firing high-rate laser beams, a LiDAR device is able to project its surroundings as 2D or 3D point cloud, which can be used for different purposes such as object detection, map generation, localization, and navigation. Autonomous vehicles are often equipped with at least one multi-layer LiDAR sensor...
While technology scaling enables increased density for memory cells, the intrinsic high leakage power of CMOS technology and the demand for reduced energy consumption inspires the use of emerging technology alternatives as Non-Volatile Memory (NVM) including STT-MRAM, PCM, and RRAM. However, their narrow resistive sensing margins exacerbate the impact of Process Variations (PV) in high-density NVM...
The emerging metal-oxide resistive switching random-access memory (RRAM) devices and RRAM crossbar arrays have demonstrated their potential in enormously boosting the speed and energy-efficiency of analog matrix-vector multiplication. Unfortunately, due to the immature fabrication technology, commonly occurring Stuck-At-Faults (SAFs) seriously degrade the computational accuracy of RRAM crossbar based...
This paper addresses a novel direction-of-arrival (DOA) estimation method for noncircular sources, such as BPSK and OQPSK modulated signals, in the presence of multipath propagation. The group steering vector of each coherent group is obtained first, and then both forward and backward group steering vectors are exploited to estimate the DOAs of the corresponding group by constructing a composite matrix...
Burst error occurs due to various factors and degrades the system performance. In this paper, we propose a burst error sensing scheme for page-oriented data. Using this scheme, the proposed method can sense a two-dimensional burst error location. In addition, it is possible to improve the performance by using erasure decoding on the sensed burst error position.
This work describes a guiding method to select the best sensing units to compose the array of an electronic tongue. It is based on the principal component analysis (PCA), in which use is made of the PCA plot of the transposed matrix of experimental data, e.g., for different concentration of an analyte. When points in such a plot appear very close to each other, it means that one of the corresponding...
The first data set of VHF lightning mapping using a Lightning Mapping Array system — LMA in a tropical region is presented in this paper. Six sensors were installed at the north of Colombia near Santa Marta city. Since the installation of the LMA network in 2015, up to 7000 intra-cloud (IC) discharges from September to November 2015 have been analyzed. The data suggests that, the electrical charge...
Recent technological developments in Unmanned Aerial Systems (UAS) have allowed the integration of UAS into the field of marine science. UAS provide a low risk, low cost platform to collect and relay data at various spatial and temporal scales. As an integral part of Ocean Observation Systems (OOS), UAS can provide an agile platform for delivering high-bandwidth, high-frequency data between surface...
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...
Matrix-vector multiplication, as a key computing operation, has been largely adopted in applications and hence greatly affects the execution efficiency. A common technique to enhance the performance of matrix-vector multiplication is increasing execution parallelism, which results in higher design cost. In recent years, new devices and structures have been widely investigated as alternative solutions...
We demonstrate an early stage of our prototypical development of an earthquake early warning system based on Apple's MacBook computers. This system, called MacSeisApp, utilizes the Sudden Motion Sensors in MacBooks to detect seismic activities. It is inspired by an existing application called SeisMac, which turns a MacBook computer into a seismograph. MacSeisApp expands on SeisMac by using Apple's...
The method of pattern design of industrial control system (ICS) software has been developed. As objects of lower hierarchy level, the elements of automation were selected. The unified algorithms of data processing and computing control actions were applied for these elements. The data types, data storage and functionality were defined for these objects. In the software of human-machine interface and...
Spin Transfer Torque Magnetoresistive RAM (STTMRAM) has been recently deemed as one promising main memory alternative for high-end mobile processors. With process technology scaling, the amplitude of write current approaches that of read current in deep sub-micrometer STT-MRAM arrays. As a result, read disturbance errors (RDEs) emerge. Both high current restore required (HCRR) reads and low current...
The paper presents a method of reducing the matrix that keeps the distance which went ultrasound and an data processing algorithm for the phased array system using MatLab. Cut of the control object for the phased array containing of 16 sensors is presented. Also The paper presents an example of practical realization of the algorithm on an FPGA using the program Quartus II.
We consider multi-static radar with a single transmitter and multiple, spatially distributed, linear sensor arrays, imaging an area with several targets. Assuming that the location and orientation of all the sensor arrays is known and that all measurements are synchronized, we develop compressive sensing based methods to improve imaging performance. Our approach imposes sparsity on the complex-valued...
The Direction of Arrival (DoA) estimation of signals impinging on a failed antenna array is approached as an optimization problem and solved by using particle swarm optimization (PSO) technique with single snapshot. The performance and usefulness of this algorithm is analyzed under different failure scenarios and also in different noisy environment. In this paper we have made a study on the tolerance...
Since a nested phased array cannot directly estimate the range of targets due to range ambiguity, this paper proposes a nested array with diverse time-delayers for target range and angle estimation. The essence is to construct a new array structure by systematically nesting two uniform linear arrays through diverse time-delays which yields a range-dependent receiving array beampattern. Using second-order...
This paper suggests using a tunable reflectarray as a hardware source of Sensing Functions (SFs) for Direction of Arrival (DoA) estimation based on Compressed Sensing (CS). Reflectarray is much more scalable than a conventional antenna array. This higher scalability can be exploited to build a measurement hardware with large aperture and high number of degrees of freedom. We introduce the simplified...
Compressive sensing (CS) in radar is presented at the system level with emphasis on the front end that keeps the functionality of data acquisition. In CS, the data acquisition is compressive as it delivers fewer measurements. We explore spatial compressive acquisition of radar measurements by the existing means available in a radar system: design of antenna arrays (AA), and focus here on active co-prime...
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