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We consider the problem of identifying the structure of a network when precedence constraints are present. The associated graph is assumed to be directed, layered and with edges that exist only between successive layers. Such precedence networks arise in manufacturing processes resulting from a necessary or desirable sequencing of subassembly tasks to be completed in order to assemble the final product...
Low power wide area network (LPWAN) receivers must first decide about the presence of a transmission in order to retrieve the information that was being sent by wireless sensor nodes. This is exacerbated by the use of modern coding techniques that are able operate at very low signal to noise ratio (SNR), and inaccuracies originating from the transmitter hardware. Several, mostly low complexity methods...
The problem of search for delay of broadband signals on the basis of code sequences is considered. The problem arises when using long code sequences in conditions of limited signal observation time and high requirements to reliability and synchronization accuracy. In these conditions use of various non-optimal methods and search algorithms, in particular, sequential-parallel search, consecutive algorithms...
We consider the problem of constructing codes that can correct δ deletions occurring in an arbitrary binary string of length n bits. Varshamov-Tenengolts (VT) codes can correct all possible single deletions (δ = 1) with an asymptotically optimal redundancy. Finding similar codes for δ ≥ 2 deletions is an open problem. We propose a new family of codes, that we call Guess & Check (GC) codes, that...
A huge upheaval emerges from the transition to autonomous vehicles in the domain of road vehicles, ongoing with a change in the vehicle architecture. Many sensors and Electronic Control Units are added to the current vehicle architecture and further safety requirements like reliability become even more necessary. In this paper we present a potential evolution of the Electrical/Electronic-Architecture,...
In this paper, a novel pilot-aided algorithm is proposed for the detection of integer frequency offset (IFO) in orthogonal frequency division multiplexing (OFDM) systems. By transforming the IFO into two new integer parameters, the proposed method can largely reduce the number of trial values for the true IFO. The two new integer parameters are detected using two different pilot sequences, a periodic...
Graph Processing has been widely used to capture complex data dependency and uncover relationship insights. Due to the ever-growing graph scale and algorithm complexity, distributed graph processing has become more and more popular. In this paper, we investigate how to balance performance and cost for large scale graph processing on configurable virtual machines (VMs). We analyze the system architecture...
Extreme learning machine is an emerging neural network architecture that offers fast learning and generalization for multiple tasks. In this work, a scalable digital architecture for multi-classifier extreme learning machine (MT-ELM) is proposed. The proposed architecture performs multiple classification tasks without reconfiguring the network. The design is validated with MNIST dataset and it is...
Analog-to-digital (A/D) conversion plays a crucial role when it comes to the design of energy-efficient and fast signal processing systems. As its complexity grows exponentially with the number of output bits, significant savings are possible when resorting to a minimum resolution of a single bit. However, then the nonlinear effect which is introduced by the A/D converter results in a pronounced performance...
A fundamental manifestation of the system-level nature of the modern SOC has been in the explosion of untimed paths on a chip. A single chip is no longer a textbook synchronous entity. Thanks to the use of complex design methodologies like asynchronous clock domains, interacting dynamic power domains, aggressive dynamic reset schemes, the wide-spread use of timing exceptions, GALS etc., large swaths...
In an energy-efficient receiver employing iterative decoders, phase synchronization errors reduce much of the gains that can be achieved at low SNRs. To address this problem, the concept of an iterative receiver has received much attention in the past. In such a framework, signal degradation at low SNR is overcome by repeated phase synchronization executed over the soft symbols generated by the iterative...
A novel three-dimensional multi-scroll nonlinear model is successfully designed in the short article. Several specific chaotic features of the new model, such as the initial value sensitivity, fractal dimension, Lyapunov exponent, complexity of this novel model are introduced. Moreover, the nonlinear electronic circuit of this system is realized by PSPICE. Finally, the synchronization scheme via chaotic...
Modern smart systems are usually built by implementing SW functionalities executed on HW platforms composed of both digital and analog components. Validation is mainly implemented through simulation of the functional behavior of the entire smart system modeled by a Virtual Platform. It is thus crucial to achieve fast mixed-signal simulation by removing unnecessary overhead due to synchronization between...
Emerging power systems are requiring changes on all layers: planning, operation and markets. Smart grids operation, including control of the energy flow in active distribution grids adds more challenges to the measurement layer. Presently there is a gap between the models used for the current and voltage waveforms in the corresponding measurement algorithms implemented by devices deployed in power...
Deep space optical communications promises orders of magnitude growth in communication capacity, supporting high data rate applications such as video streaming and high- bandwidth science instruments. Pulse position modulation is the modulation format of choice for deep space applications, and by inserting inter-symbol guard times between the symbols, the signal carries the timing information needed...
The speedup is usually limited by two main laws in high-performance computing, that is, the Amdahl's and Gustafson's laws. However, the speedup sometimes can reach far beyond the limited linear speedup, known as superlinear speedup, which means that the speedup is greater than the number of processors that are used. Although the superlinear speedup is not a new concept and many authors have already...
Although the Filter bank multicarrier with offset quadrature amplitude modulation (FBMC-OQAM) systems are robust against double selective fading channels, it unfortunately is still sensitive to timing offset and carrier frequency offset (CFO) errors. To solve this synchronization problem, in this paper, we propose a new data-aided timing and CFO synchronization scheme, that exploits the conjugate-symmetry...
Shaped Offset QPSK (SOQPSK) is a highly bandwidth-efficient constant envelope waveform. In order to increase hardware and energy efficiency, a new architecture for fully coherent SOQPSK demodulation is proposed that is suitable for continuous and burst mode transmission. It contains Decision-Directed (DD) synchronization loops for frequency, phase and timing offsets and a low complex method combining...
Complex handling and assembly tasks can be gradually decomposed into simpler sub-tasks until a level of elementary 'primitive' tasks is reached, which can be expressed generically by so-called Manipulation Primitives. Manipulation Primitives can hence be utilized as the foundation of a unified paradigm to specify and execute complex sensor-based robot tasks. By embedding these Manipulation Primitives...
The 3rd Generation Partnership Project (3GPP) has started to investigate feasibility of machine type communication terminal class in Long Term Evolution (LTE) networks in the Release 12 to address the requirements of the Internet of Tings (IoT) targeting low-end device market with improved coverage. Along with that, the 3GPP has defined reference signals to support device discovery, communication...
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