Optimal bredbandig vågform framtagen genom generaliserad osäkerhetsfunktion
Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesis
The waveform of a radar signal affects the resolution in velocity and distance. The ambiguity function is used as an aid for analysing narrow band radar signals simultaneously in time and frequency. An analysing tool for wide band radar signals is missing.
This thesis describes a generalised ambiguity function to be utilised for study of wide band signals. Waveforms are further synthesised with help of the developed analysing tool. The aim is to start with a certain ambiguity function and find a waveform that reproduces the same ambiguity function.
Mathematical formulas are presented and implemented in Matlab to produce the wide band ambiguity function. Functions for developing waveforms by synthesis is also implemented.
It turns out that the Hermitian functions used as base functions do not preserve the orthogonality when implemented as wide band signals. The synthesis is not fully successful. Therefore an alternative method with numerical optimisation is used in an attempt to find an optimal waveform.
Place, publisher, year, edition, pages
2005. , 77 p.
Wide-band ambiguity function, synthesis, waveform, Hermitian functions
IdentifiersURN: urn:nbn:se:liu:diva-5251ISRN: LITH-ISY-EX–05/3719–SEOAI: oai:DiVA.org:liu-5251DiVA: diva2:21235