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ICx Radiation, Inc. has implemented a novel timing method for use in a Compton telescope that is capable of nanosecond timing resolution. A critical task in Compton telescope design is to minimize the timing variance between detectors in a large array in order to reduce the background. The voxelSPEC has been developed to combine precise timing with pulse processing electronics in a single device,...
In the CAN bus, mistakes in bit timing will lead to serious decline in bus performance. How to deal with the bit timing of CAN bus communication decided whether the CAN controller can receive or transmit data correctly. According to bus protocol, bit synchronization will fix bit errors resulting from improper setting in many cases. This paper illustrated the structure of nominal bit time and the principle...
Instruments for Control and Data Acquisition (CDAQ) require a pervasive embedded network able to provide accurate timing and synchronization signals to all digitalization/reconstruction devices and control processes of a CDAQ system. Typically, the industry trend is to adopt a well established computer instrumentation standard and complement it with adequate timing and synchronization resources for...
White Rabbit (WR) is the project name for a ambiguous project that uses Ethernet as both, deterministic (synchronous) data transfer and timing network. The presented design aims for a general purpose, fieldbus like transmission system, which provides deterministic data and timing to approximately 1000 timing stations. The main advantage over conventional systems is the highly accurate timing (sub-nanosecond...
The IEEE 1588 Standard, sometimes called PTP, specifies that PTP nodes conform to all clauses of the standard with the exception of ldquooptionalrdquo clauses and that applications that distribute only frequency do not require the measurement of the path delays (section 19.2.1, [1]). The standard doesn't provide specifications for conformance testing. Conformance testing requires the consideration...
The Flexray protocol is rapidly emerging as the next generation in-vehicle communication protocol that will accommodate safety critical, high bandwidth and real time requirements coming from the burgeoning increase of automotive electronic content. The Flexray protocol provides a globally synchronized time base and has provisions for a Time Division Multiple Access (TDMA) based transmit model (static...
In this paper, we consider asynchronous two-way wireless relay networks with amplify-and-forward protocol (AF- TWRN), where the distributed space-time code (DSTC) is utilized without synchronization among relays to assist the communication between two terminals. We analyze the pairwise error probability (PEP) behavior of DSTC for AF-TWRN under frequency-selective channels. From our analysis, it is...
Wireless sensor networks require shared medium access management to prevent collisions, message corruption and other unhelpful effects. Cellular sensornets require minimal energy consumption to maximise network lifetime, and management of interaction with base stations and other cells. We present a protocol which dynamically generates a near-optimal duty schedule within a cell such that communication...
This paper presents some real-time concepts as they are found in the AADL language and proposes their expression in two formalisms suitable for formal analysis: FIACRE which is based on timed transition systems and TASM which extends abstract state machines with resource consumption mechanisms.
Systems-on-chip designs often use functional blocks operating at different clock frequencies. This motivates the use of an asynchronous network-on-chip (NoC) with synchronizing FIFOs interfacing between the NoC and the functional blocks. To minimize design time, these FIFOs should be constructed from cells available in a standard cell library and configurable to work in a wide range of applications...
In this paper we present fundamental results on secure clock synchronization and man-in-the-middle detection using only timing information. Under the assumption of afflne clocks, we present a clock synchronization protocol that can operate on any channel on which data can be sent. We present a clock synchronization protocol from the literature and add verification steps on top of this protocol. These...
All wireless systems require the precise timing synchronization to satisfy the higher quality of service (QoS) requirements. Particularly, timing synchronization between base stations (BSs) during soft handover is required to increase the diversity gain of soft handover. Current timing synchronization protocol (e.g. IEEE1588, GPS) updates the synchronization at fixed time duration and it causes the...
The FlexRay network protocol will replace the role which the CAN protocol has for in-vehicle backbone networks. A FlexRay communication controller model based on SystemC, combined with other SystemC models and RTL IPs, can be simulated in a system level through various simulation tools. This paper proposes the method of developing the model of a FlexRay communication controller based on SystemC and...
Fibre channel is a gigabit-speed network technology which dominates todaypsilas high-end storage network market. Its topology consists of several layers. This paper presents a transceiver design with FS-HSPI compliant interface used for Fibre Channel Transmission Protocol Layer.. or FC-1 layer. Optimized 8B/10B encoder/decoder architecture and parallel CRC checking algorithm are used in order to satisfy...
In this paper, we study the asynchronous cooperative diversity schemes employing the amplify-and-forward (AF) protocols over the frequency-selective channel. We consider three time-division-multiple-access (TDMA) based cooperation protocols and derive the corresponding pairwise error probabilities (PEP). From our analysis, it is seen that of the paths from the source to relays and from relays to the...
Mobile ad-hoc networks (MANET) are often characterized with rapidly changing topologies, presenting a constant challenge for time synchronization. This challenge holds especially true in tactical edge ground military networks, where topological instabilities are enhanced by hostile transmission environments. In the absence of GPS, time synchronization within the context of a tactical environment requires...
We consider synchronization techniques required to enhance the cellular network capacity using base station cooperation. In the physical layer, local oscillators are disciplined by the global positioning system (GPS) and over the backbone network for outdoor and indoor base stations, respectively. In the medium access control (MAC) layer, the data flow can be synchronized by two approaches. The first...
The slow speed of conventional execution-driven architecture simulators is a serious impediment to obtaining desirable research productivity. This paper proposes and evaluates a fast manycore processor simulation framework called two-phase trace-driven simulation (TPTS), which splits detailed timing simulation into a trace generation phase and a trace simulation phase. Much of the simulation overhead...
Itpsilas a new data business to realize high-speed data transmission over broadcast channel by using traditional broadcast station. To complete this function must rely on the realization of wireless high-speed modem. This paper introduced the character of FX919B and choice of some parameter. It particularly narrated circuit design and programmer about the application of FX919B. This chip realized...
In order to achieve predictability, time-triggered communication systems have been proposed for use in in-vehicle applications, in particular for safety-critical applications. Timing properties play a crucial role in a time-triggered system as activities in such a system are all triggered by the passage of time. In this paper, we propose techniques for specifying and verifying the timing properties...
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