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1	Evaluation of Xilinx System Generator / Evaluation of Xilinx System Generator Fandén, Petter January 2001 (has links) This Master’s Thesis is an evaluation of the software Xilinx System Generator (XSG) and blockset for Matlab. XSG is a module to simulink developed by Xilinx in order to generate VHDL code directly from functions implemented in Matlab. The evaluation was made at Saab Avionics AB in Järfälla, north of Stockholm. In order to investigate the performance of this new module XSG to simulink, a model of a frequency estimator often used in digital radar receivers were implemented in Matlab using XSG. Engineers working at SAAB Avionics implemented the same application directly in VHDL, without using Matlab and the XSG. After generating code the results were synthesised, analysed and compared. The frequency estimator basically contains an FFT, a windowing function and a sorting algorithm used to enable analyse of two real signals simultaneously. There were however problems during generation of the VHDL code and the model had to be broken into smaller parts containing only a 16-point FFT. The results of comparison in this report are based on models containing only this 16-point FFT and they show a small advantage for the System Generator according to the resource usage report generated during synthesis. Designing models for generation using Xilinx Blockset can create a lot of wiring between components. The reason for this is that the System Generator and Xilinx Blockset today is a new tool, not completely developed. There are many components found in simulink, Matlab that could not be found in Xilinx Blockset, this is however being improved. Another problem is long time for simulation and errors during generation. My opinion is that when used for smaller systems and with further development the System Generator can be a useful facility in designing digital electronics. Electronics Xilinx Systemgenerator Xilinx blockset FFT fönsterfunktion telekrig radarvarnarmottagare Xilinx System Generator Xilinx blockset F FT windowing functions electronic warfare radar-warning receivers Elektronik Electronics Elektronik
2	Evaluation of Xilinx System Generator / Evaluation of Xilinx System Generator Fandén, Petter January 2001 (has links) <p>This Master’s Thesis is an evaluation of the software Xilinx System Generator (XSG) and blockset for Matlab. XSG is a module to simulink developed by Xilinx in order to generate VHDL code directly from functions implemented in Matlab. The evaluation was made at Saab Avionics AB in Järfälla, north of Stockholm. </p><p>In order to investigate the performance of this new module XSG to simulink, a model of a frequency estimator often used in digital radar receivers were implemented in Matlab using XSG. Engineers working at SAAB Avionics implemented the same application directly in VHDL, without using Matlab and the XSG. After generating code the results were synthesised, analysed and compared. </p><p>The frequency estimator basically contains an FFT, a windowing function and a sorting algorithm used to enable analyse of two real signals simultaneously. There were however problems during generation of the VHDL code and the model had to be broken into smaller parts containing only a 16-point FFT. The results of comparison in this report are based on models containing only this 16-point FFT and they show a small advantage for the System Generator according to the resource usage report generated during synthesis. </p><p>Designing models for generation using Xilinx Blockset can create a lot of wiring between components. The reason for this is that the System Generator and Xilinx Blockset today is a new tool, not completely developed. There are many components found in simulink, Matlab that could not be found in Xilinx Blockset, this is however being improved. Another problem is long time for simulation and errors during generation. </p><p>My opinion is that when used for smaller systems and with further development the System Generator can be a useful facility in designing digital electronics.</p> Electronics Xilinx Systemgenerator Xilinx blockset FFT fönsterfunktion telekrig radarvarnarmottagare Xilinx System Generator Xilinx blockset F FT windowing functions electronic warfare radar-warning receivers Elektronik Electronics Elektronik
3	Program för frekvensanalys / Program for Frequency Analysis Rodesten, Stephan January 2017 (has links) Denna rapport täcker arbetsprocessen bakom att skapa en spektrumanalysator. Läsaren kommer att få läsa om den valda metoden men även alternativa metoder. Utöver detta kommer även de teoretiska delarna bakom varje moment att undersökas samt jämföras med potentiella alternativa lösningar. Projektet har utförts på uppdrag av KA Automation. Syftet med projektet var att skapa en basplattform för analys av ljudfrekvenser. Målet med detta var att kunna identifiera ljudegenskaper i form av frekvenserna hos exempelvis servomotorer i vattenpumpar. Tanken var att i ett senare utvecklingsskede kunna identifiera om och när nya frekvenser dykt upp i ljudprofilen vilket i sådana fall kan resultera i att motorn är i behov av service. Basplattformen är uppbyggd med hjälp av C# och ljudbehandlingsbiblioteket NAudio. Från resultatet kan slutsatsen dras att detta program kan analysera ljud och visa de olika frekvensernas styrka och därmed är en lämplig basplattform för vidareutveckling. / This report will cover the work process behind creating a spectrum analyzer. The reader will be able to read about the chosen method but also the alternative methods. Apart from this the theoretical parts behind every moment will also be covered and compared to potential alternative solutions. The project has been carried out on behalf of KA Automation. The purpose of the project was to create a base for analyzing sound frequencies. The goal was to be able to identify sound properties in the form of frequencies in servo motors in for example water pumps. The idea was to be able to in a later development stage be able to identify when new frequencies have entered the audio profile which might result in the motor to be in need of service. The base is created with the help of C# and the sound library NAudio. From the result one can conclude that this program can analyze sound and display the magnitude of its frequency components and is therefore a suitable base for future development. frequency analyzer analyze spectrum signal processing discrete fourier transform fast radix-2-fft radix-2 cooley tukey window function magnitude normalize hamming hann hanning complex number sampling sample sound wave microphone rate size format audio byte frekvensanalys spektrum dsp digital signalbehandling fouriertransform dft fft cooley-tukey fönsterfunktion amplitud decibel normalisering komplex komplexa tal sampel bit ljud våg mikrofon analys samplingshastighet samplingsstorlek ljudformat frekvenser frekvens spektra analog Computer Sciences Datavetenskap (datalogi)

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