Title :
Development of DSP algorithm for DME coherency measurement
Author :
Dycka, Pavel ; Makula, Petr
Author_Institution :
Univ. of Defence, Brno, Czech Republic
Abstract :
Air traffic regulations do not specify the parameter of coherency for DME system ground beacons, however this attribute of signal has a large impact on possibilities of digital signal processing of the signal. For example, coherent signal might be used for Doppler frequency measurement or measurement of their immediate phase can be used for high resolution time measurement. Concerning DME this can lead to higher precision measurements of both radial length and radial speed of the airplane making the measurement. In this paper there is described one possibility of DSP algorithm, that can be used to evaluate coherency of DME ground beacon signal, or any impulse signal with analogical attributes to DME. For the development we use vector signal generator to generate as similar signal to DME as possible and the algorithm itself is implemented on FPGA device, which perfectly suits this application. Before this we evaluated the credibility of the algorithm with MATLAB simulations, results of which are also shown in this paper.
Keywords :
air traffic; digital signal processing chips; distance measurement; field programmable gate arrays; signal generators; DME coherency measurement; DME ground beacon signal coherency evaluation; DME system ground beacons; DSP algorithm; Doppler frequency measurement; FPGA device; Matlab simulations; air traffic regulations; digital signal processing; high resolution time measurement; impulse signal; phase measurement; radial length; radial speed; vector signal generator; Detectors; Field programmable gate arrays; Finite impulse response filters; Frequency measurement; Local oscillators; Phase measurement; Signal processing algorithms; Aircraft navigation; Distance measurement; Field programmable gate arrays; Phase measurement;
Conference_Titel :
Military Technologies (ICMT), 2015 International Conference on
Conference_Location :
Brno
Print_ISBN :
978-8-0723-1976-3
DOI :
10.1109/MILTECHS.2015.7153738