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All-digital transmitters are getting increased attention due to its closer proximity to the ideal software-defined radio (SDR) transmitter. In this paper we propose a new transmitter architecture that addresses two key limitations of current approaches, namely, the poor coding efficiency and the high quality factor requirements of the RF output(More)
An atomic broadcast protocol is a very important building block of any fieldbus based dependable distributed embedded system. Under certain error scenarios native CAN mechanisms do not enforce atomic broadcast and inconsistent message duplicates or omissions may occur. The probability of those error scenarios depend on an important factor , the CAN bit(More)
The emerging interest in vehicular networks (VANET) led to the deployment of several small and medium-scale testbeds to evaluate the characteristics of this technology in real-world scenarios. Despite this, due to the low availability and high cost of IEEE 802.11p/WAVE fully compliant hardware and software, many of these experiments have been performed with(More)
This paper suggests a novel architecture for a reconfigurable accelerator for computations over discrete vectors. The number of executed operations is limited but they can arbitrarily be chosen from a practically unlimited set of feasible operations. The software model and hardware implementations of the accelerator are discussed in detail.
DESIGN PROBLEMS The paper discusses some new hardware and software tools that can be used for the design of virtual circuits based on dynamically reconfigurable FPGAs. With the aid of these tools we can implement a system that requires some hardware resources R c , on available hardware that has resources R h , where R c >R h. The main idea of the approach(More)
In a near future, vehicles will be equipped with WAVE-compliant communication technology, enabling not only safety message exchange, but also infotainment and Internet access. However, without complete market penetration, other technologies must still be used, such as IEEE 802.11g/n to connect to public Wi-Fi hotspots in the city, or even 3G and 4G cellular(More)
Emerging vehicular communications are a key to combat several mobility issues, like road safety and efficiency. Dedicated short range communications (DSRC) is a wireless technology, operating at 5.9GHz, designed for automotive use. To operate, this technology has two types of devices, one for vehicles and another for roadside. This paper presents the design(More)
After almost a decade of R&D, vehicular communications for cooperative systems and its enabling technologies, mostly relying on IEEE 802.11p and IEEE 1609.1-4 family of standards, are in their trial phase, as some major field operational tests are being carried out. Nevertheless , there are still some open problems concerning the timeliness, dependability(More)