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Image acquisition, analysis, compression and transmission have become mandatory tasks in embedded systems and internet connected devices. Compression and size reduction techniques increases the number of images stored on a memory space and reduces bandwidth consumption while increasing transmission speed on a communication channel and internet connected nodes. Images can be compressed and decompressed...
Image compression and size reduction increases the number of images stored on a memory space and reduces bandwidth consumption while increasing transmission speed on a communication channel. Images can be compressed and decompressed using different methods and algorithms. With the vast increase of quality and size, dedicated processors with parallel processing blocks such as FPGAs are mainly targeted...
This letter presents an FPGA implementation of a fault-tolerant Hopfield Neural Network (HNN). The robustness of this circuit against Single Event Upsets (SEUs) and Single Event Transients (SETs) has been evaluated. Results show the fault tolerance of the proposed design, compared to a previous non-fault-tolerant implementation and a solution based on triple modular redundancy (TMR) of a standard...
Medical Imaging has historically been very successful to expose the patient's anatomy beyond external visibility; thus, allowing more efficient and accurate treatments. The field of medicine continues to search for new techniques in order to increase accuracy, reduce complications, enable real-time feedback, allow early detection and reduce human errors. Various medical imaging techniques exist but...
An approach to study the effects of single event upsets (SEU) by fault injection performed at system-level is presented. It is illustrated by results obtained on two different versions of a matrix multiplication algorithm, one standard and the second with fault tolerance capabilities. The final goal of this work is to validate fault tolerance techniques implemented at software level and provide a...
A fully automated fault-injection method is presented. It deals with transient faults resulting from the impact of energetic particles and it can be applied early at design phase, on any circuit for which the register transfer level model is available. Results issued from its application to an Artificial Neural Network benchmark application put in evidence the accuracy of the studied method to predict...
The associative Hopfield memory is a form of recurrent Artificial Neural Network (ANN) that can be used in applications such as pattern recognition, noise removal, information retrieval, and combinatorial optimization problems. In general, ANNs are considered as intrinsically fault-tolerant. A study of the capability of this algorithm to tolerate transient faults such as bit-flips provoked by the...
In this paper the consequences of SEU (Single Event Upset) faults on System on Chip devices (SOC) are studied. A PSOC microcontroller CY8C27643 manufactured by Cypress was chosen as a test vehicle. Fault injection sessions were performed using the so-called (Code Emulated Upset) approach in two different HW/SW environments. Obtained results put in evidence the potentially critical consequences of...
Node localizations techniques are a critical part in many wireless sensor network (WSN) applications. There are several challenges for building an efficient localization system that is suitable for wireless sensor networks, mainly, reducing computational complexity and communication overhead. For example, solving an over constraint set of linear equations via least square approximations and utilizing...
One of the ambitious design goals of future generations of wireless systems, including 4G, IEEE 802.11n/802.16 standards, is to reliably provide very high data rate transmission in real-time. This poses a challenge to find an optimal coding scheme that has good performance and can be efficiently implemented in hardware. The most well-known LDPC decoding algorithm is log sum product (log-SP) in which...
A new method is proposed to achieve a multirate overlapped code division multiple access system (OV-CDMA) based on a novel code overlapping procedure. The signal-to-interference ratio (SIR) performance has been investigated for such system. A channel model that allows multirate overlapped transmission is presented based on which a closed form solution for the SIR has been derived. In addition, a simple...
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