цифрова обробка

Synthesis of a Macromodel for a Virtual Signal Simulator of Adaptive Acoustics

This work is dedicated to the development of a macromodel for the virtual signal simulator of adaptive acoustics, Data@Sim, based on the formal analogy method. The structure of modeling electro- acoustic processes in adaptive acoustics tasks and approaches to the unification of research on electrical and acoustic signals are presented. An algorithm for synthesizing virtual signals that accounts for temporal parameters of sound wave propagation and attenuation, as well as noise and interference effects, is proposed.

Digital method of SSB modulation

This paper is dedicated to modeling of the digital method of single-sideband (SSB) modulation. Digital method of SSB modulation provided in this paper is based on Weaver`s method of SSB modulation. The design and calculations of digital blocks are detailed. Such a model allows obtaining the output SSB signal in time and frequency domains at given input signals and system parameters. This could be useful for design and optimization purposes.

Update of topographic maps of Iraq, scale of 1: 50 000 using satellite image – IKONOS

The aim is to find accurate, fast and economical way to update maps with information obtained by remote sensing data. There were all the necessary research to update the maps of the study area city of Kerbala (Iraq) scale 1: 50,000, which was last upgraded in 1984. Method. Updating map was carried out in three stages. The first stage – the digital processing of satellite images and maps using GIS professional ArcGIS9. After combining the coordinate system of satellite images and maps was performed controlled classification.