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Mathematical modeling is an important approach for creating a parallel database management system that could efficiently use capabilities, provided by modern heterogeneous computational clusters, equipped with manycore coprocessors or GPUs. To this day, several models heterogeneous computational systems were proposed, but none of them is suited for modeling database processing. In this paper, we address...
Sensor localization problem is one of the fundamental issues in Wireless Sensor Networks (WSN). In this paper, we investigate this problem and present an innovative Radio Interferometric Positioning System (RIPS) for WSN — Stochastic Radio Interferometric Positioning System with Unsynchronized Modulated Signals (SRIPS_UMS). To the best of our knowledge, we are the first to utilize unsynchronized modulated...
In this paper, we introduce the multi-drone platform which is realized by swarm algorithm. One of the most challenging problems when maneuvering multiple drones is guaranteeing collision avoidance. Since our swarm algorithm is based on the artificial potential function(APF), collision avoidance between quadrotors is guaranteed. First, the constructive way to generate swarm controller will be given...
Wireless power transfer (WPT) could revolutionize global transportation and accelerate growth in the Electric Vehicle (EV) market, offering an attractive alternative to cabled charging. Coil misalignment is inevitable due to driver parking behaviour and has a detrimental effect on power transfer efficiency (PTE). This paper proposes a novel coil design and adaptive hardware to improve PTE in magnetic...
This paper describes high performance implementation of DVB-S2 modem on the rad-hard manycore RC64 DSP. Multi-level simulation and development methodologies are described. Modem algorithms are specified, together with implementation details. Efficient parallel processing is enabled by the shared memory architecture, by PRAM-like task oriented programming and by dynamic allocation of tasks to cores...
This paper discusses the implementation of a software defined radio (SDR) that uses orthogonal frequency division multiplexing (OFDM). The transmitter and receiver were modeled and simulated using the Xilinx® blockset in MATLAB Simulink® then implemented on hardware using Xilinx® System Generator. Performance of the SDR system was evaluated by measuring BER, PAPR and spectral efficiency under simulated...
Among the various ranging techniques, Radio Signal Strength (RSS) based approaches attract intensive research interests because of its low cost and wide applicability. RSS-based ranging is apt to be affected by the multipath phenomenon which allows the radio signals to reach the destination through multiple propagation paths. To address this issue, previous works try to profile the environment and...
Localization is one of the key issues in the wireless sensors network. Regarding the mobility of the nodes in some of the applications, it is necessary to have a localization algorithm that can support the mobility of nodes. Most of the approaches that have been presented so far have required instruments for the measurement of the distance and the angle or they have needed many beacon nodes for localization...
An optimized soft-decision de-mapping method for Chinese Terrestrial DTV(Digital TV) Broadcasting Standard is proposed, which can be used on 64QAM, 32QAM, 16QAM and 4QAM de-mapping that compliant with the standard. Using the simplified de-mapping algorithm, the hardware resource usage and working speed are both optimized. Especially for 32QAM mode, comparing to traditional method, 75% hardware resource...
Acquisition is the key function modules of the baseband system of satellite navigation receiver. In the GNSS receiver for GPS, GLONASS and Beidou, in order to acquire the three navigation signals at different chip rates and frequency, three FFT processors are needed when using the parallel search based on FFT. GNSS receiver can choose best navigation system according to the signal strength of different...
The research discussed in this paper addresses the question of how to simulate realistic observables from current and pending Global Navigation Satellite Systems (GNSSs) in a way that is independent of the characteristics of specific systems. The generated observables can be used to predict future multi-GNSS performance and aid in the development of enhanced processing algorithms. This paper introduces...
The travel time calculation of seismic wave propagation in synthetic earth models is a fundamental technique needed for Kirchhoff seismic modeling and migration. Migration is a process used to image the subsurface. In this paper, using layer-based models, a genetic algorithm (GA) approach is presented to calculate the travel time, and implement GA for Kirchhoff ray tracing modeling and Kirchhoff migration...
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