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As the demand for more data storage space continues to grow at an unprecedented pace, the need for real time data compression systems becomes more prominent. One of the well-known methods among lossless data compression algorithms is LZW. In this paper, a new prediction algorithm has been introduced that is able to predict whether or not a data block is compressible with the LZW method. Furthermore,...
Model-driven development has become the state- of-the-art approach for designing embedded real-time systems. Due to their high level of abstraction, models are easier to understand and verify, thus leading to less faulty systems. But even when combined with automatic code generation, there is still the risk of unintended behavior. This may, for example, arise from real sensor inputs which differ from...
Transaction Level Modelling (TLM) is an emerging design approach to accelerate Electronic System Level (ESL) design. A virtual TLM prototype of an embedded system is an integration of computation and communication. Currently, TLM communication and hardware modelling has been well discussed and standardised. However, there still exist problems in the domain of TLM for software computation modelling...
Satellite attitude control systems have too many dynamic variables for all cases of operation. Therefore, their tests for all these conditions may not be possible or may require highly specialised test environments. As an alternative to these time consuming and expensive methods, real time digital simulation and hardware in the loop methods that are developed in the latest years can be used. This...
This paper outlines the development of an efficient multi-cycle, signal adaptive hardware design of a system for time-frequency (TF) signal analysis, suitable for real-time implementation on an integrated chip. The proposed design allows the implemented system to take variable number of clock (CLK) cycles (the only necessary ones regarding the high auto-terms quality) in different TF points within...
The present paper discusses the strategic evolution of avionics tests systems at Eurocopter requested by virtualization turn. Until now considered as a necessary evil in the global avionics product lifecycle, tests systems are taking the path to be promoted as key productivity enablers. Industry competitiveness pushes avionics actors to revisit and strengthen their Verification & Validation capabilities...
This paper deals with modeling and simulation of important part of a generating block within the frame of Flexible Energy System (FES), particularly furnace, evaporator, mixing header, pipeline, reheater/superheater and turbine. Mathematical model of a reheater/superheater is described in detail in order to demonstrate how the problem is solved and why Matlab & Simulink environment has been chosen,...
Cognitive radios are the advanced wireless systems that are used to intelligently access the scarce radio resource - the spectrum. Cognitive radios have ability to sense the ambience, spectrum usage, geo conditions and fuse these information to arrive at a spectrum decision which helps to access the network in a `smart', controlled manner. However, the incumbent licensed systems are not sure on the...
In this paper, we propose a control and simulation method of hardware IPs(intellectual properties) in HDL, by the use of LabVIEW, Simulink, and active-HDL. The hardware IPs modeled with active-HDL are connected to Simulink by HDL Blackbox, one of Simulink block sets. In addition, LabVIEW is also connected to Simulink using LabVIEW SIT(simulation interface toolkit). With Simulink as the center, a software...
In recent days, the complexity of software has increased significantly in embedded products in such a way that the verification of embedded software (ESW) now plays an important role to ensure the product's quality. Embedded systems engineers usually face the problems of verifying properties that have to meet the application's deadline, access the memory region, handle concurrency, and control the...
Hardware-in-the-loop (HIL) real-time simulation is becoming a significant tool in prototyping complex, highly available systems. The HIL approach permits testing of hardware prototypes of components that would be extremely costly or difficult to test in the deployed environment. In power system simulation, key issues are the ability to wrap the systems of equations (such as Partial Differential Equations)...
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