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A proof-of-principle demonstrator based on ultra-sonic technology capable of identifying the beacon node within 450 μs is discussed. Time difference of arrival is measured by means of a microcontroller-based board Nucleo STM32 L152RE combined with a custom receiving circuit. The position is computed using a personal computer after the demonstrator acquisition. The demonstrator is validated by static...
Technology nowadays is growing very rapidly, so many systems have been digitized. Most of the digitization of this system leads to the development of web-based systems, it's also combined with embedded systems, to create a system called Web of Things. Besides, digitalization will be very useful if applied to the public service system, one of which is the queuing system. In this research, we are making...
This paper presents the details of a data acquisition system for space communication. It is efficient, adaptive, secured and low complexity featured CCSDS based Packet Telemetry System. Previously each space agency had its own data handling systems and protocols which were not interoperable. Hence, CCSDS (Consultative Committee for Space Data Systems) was developed as an international standard for...
High-speed cameras are expanding into science laboratories in many disciplines. For example, they can be used for monitoring of the impact testing course, widely spread in evaluation of materials. Usually, they exhibit a slight delay between the trigger pulse was applied and the recording was started. For many applications, this delay may be critical. The authors of this paper have faced two problems:...
Near Field Communication (NFC) is relatively a new technology, working on the principle of “tap and transfer” paradigm for secure, short range communication. The data transfer between two NFC devices at any instance depends upon available memory of the tag, ranging from 48 bytes to 1 kilobytes and more. In this paper, we are addressing the synchronization issue of the Read/Write mode of NFC. The Read/Write...
Shared Memory stands out as a sine qua non for parallel programming of many commercial and emerging multicore processors. It optimizes patterns of communication that benefit common programming styles. As parallel programming is now mainstream, those common programming styles are challenged with emerging applications that communicate often and involve large amount of data. Such applications include...
Wireless devices for ambulatory ECG monitoring are becoming increasingly popular. One of the challenges that wireless monitoring has to deal with is clock synchronization between the wireless sensor device and the controller device. The monitoring device is usually kept as simple as possible to maximize its autonomy, and is thus limited in its clock accuracy. In this article, we describe a method...
Ease of programming is one of the main impediments for the broad acceptance of multi-core systems with no hardware support for transparent data transfer between local and global memories. Software cache is a robust approach to provide the user with a transparent view of the memory architecture; but this software approach can suffer from poor performance. In this paper, we propose a hierarchical, hybrid...
We present an approach for formal modelling of SystemC programs build uppon the “Behavior, Interactions and Priority” framework. Produced automata interactions are restricted only by using priorities rather than cutting their interactions. Produced models have thus the advantages of being composable — with other futur programs — without any change, except for the priorities. Furthermore automata are...
The secrecy of information predominantly relies on secrecy of used cryptographic key rather than secrecy of cryptographic algorithm. Thus, a very important component of cryptographic system verification is proofing that cipher text originates from given plain text and specified cryptographic key. The implementation of such methodology is complex in bulk mode transmission systems with multi Gbit/s...
Deterministic behavior is an important paradigm for verification and validation of real-time systems such as those on crewed space vehicles and robotic spacecrafts. Providing deterministic characteristics of the data transfer for the spacecraft that uses the SpaceWire technology is an essential problem, especially for autonomous vehicles like satellites. Deterministic data delivery guarantees that...
This paper describes how SpaceWire Time Codes can be used for synchronizing time within various subsystems of a spacecraft as well as, maintaining a common time reference needed for coordinating operations within a spacecraft. The algorithms to account for inaccuracies in the time distribution method were based on the NASA-4009 Space Telecommunication Radio System (STRS) standard [1], which defined...
Indoor localization with Uplink Time Difference of Arrival (U-TDoA) provides good scalability, high updates rates and high accuracy. However, clock errors lead to localization errors and synchronization is important. In this paper, we design and implement wired and wireless synchronization and provide a comparison between them. We design and implement a wireless synchronization with clock drift compensation...
In order to meet the demands of communication among controllers in hostile environment, CANopen has designed a redundant CAN network. This paper has designed a redundant communication protocol based on CANopen. The protocol abandoned the Master and Slave mechanism in the CANopen, and improved the redundant mechanism, e.g. the sending way of SYNC, and used the rolling counter in the redundant network...
Coupled oscillator-based networks are an attractive approach for implementing hardware neural networks based on emerging nanotechnologies. However, the readout of the state of a coupled oscillator network is a difficult challenge in hardware implementations, as it necessitates complex signal processing to evaluate the degree of synchronization between oscillators, possibly more complicated than the...
We present the design, operation and test results of a time-to-digital converter based on multiphase clock and implemented in Kintex-7 FPGA (Xilinx). Proposed solution involves a Vernier delay line constructed with the use of Look-Up Tables and interconnect resources. Taking advantage of rising amount of available interconnect resources in modern FPGA devices a various number of phase segments in...
Symbol timing synchronization is an important component in communication systems. The quality and reliability of wireless network communication will improve with accurate symbol timing recovery. In this paper, we present a symbol timing synchronization method by interpolating the samples at the output of the matched filter to compute the desired time instants. Since interpolation jitter is the major...
Licensed-Assisted Access (LAA) which allows LTE to be deployed in unlicensed spectrum is a promising technique currently under standardization in 3GPP Rel-13. To guarantee a peaceful coexistence of LAA with the incumbent systems such as WiFi, listen-before-talk (LBT) which requires the node to sense the medium before data transmission is introduced. On the other hand, LBT also prevents simultaneous...
Several literatures focused on self-testing of digital and analog integrated circuits. They proposed different test scenarios for the circuit board based on the signature analysis. The single-shot (SS) circuit is important element on the circuit board level in the industrial applications. In this paper, a new testing design is presented to functionally test the SS circuit on the circuit board. It...
This paper presents a low-power 14-bit column-level ADC for 640×512 size uncooled infrared imager. A novel differential-ramp single-slope (DRSS) structure is proposed in this work, which achieves 2x faster conversion speed and 3dB higher SNR performance compared with classical single-slope scheme. Moreover, a novel low-power area-saving result-consistent coarse-fine TDC scheme is proposed. The sensor...
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