DocumentCode :
1970790
Title :
Synthesis of pulsed frequency modulated ultra wideband radar signals based on stepped phase shifting
Author :
Carlowitz, Christian ; Vossiek, Martin ; Esswein, Alexander ; Weigel, Robert
Author_Institution :
Inst. for Microwave Eng. & High Freq. Technol., Univ. of Erlangen-Nuremberg, Erlangen, Germany
fYear :
2012
fDate :
17-20 Sept. 2012
Firstpage :
343
Lastpage :
346
Abstract :
The current paper introduces a novel concept for low complexity and low power synthesis of pulsed frequency modulated ultra wideband (PFM UWB) signals. Instead of using a VCO-based synthesizer, we employ a simple digitally tuned phase modulator that varies the phase of a high order harmonic of a fixed frequency LO signal. The phase modulated harmonic is then injected into a switched injection locked pulse oscillator. Based on this concept, an arbitrary sequence of phase samples - i.e. UWB pulses where each pulse has a predefined carrier phase - can be generated. This sampled pulse sequence can be used for the generation of angle modulation schemes for communication signals and also for the generation of pulsed linear frequency modulated radar signals. The capability of the proposed concept is experimentally demonstrated for the synthesis of 6 to 8 GHz UWB pulsed frequency sweeps. Measurement results verify that this novel approach delivers a performance comparable to much more complex pulsed frequency modulation implementations.
Keywords :
phase modulation; signal synthesis; ultra wideband radar; voltage-controlled oscillators; PFM UWB signals; UWB pulses; VCO-based synthesizer; angle modulation schemes; arbitrary sequence; communication signals; digitally tuned phase modulator; fixed frequency LO signal; frequency 6 GHz to 8 GHz; low complexity synthesis; low power synthesis; phase modulated harmonic; pulsed frequency modulated ultra wideband radar signal synthesis; pulsed frequency modulation; pulsed linear frequency modulated radar signal generation; stepped phase shifting; switched injection locked pulse oscillator; Bandwidth; Distance measurement; Frequency modulation; Frequency synthesizers; Phase modulation; Radar; Receivers; Injection locked oscillators; radar; signal sampling; transponders; ultra wideband technology;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Ultra-Wideband (ICUWB), 2012 IEEE International Conference on
Conference_Location :
Syracuse, NY
ISSN :
2162-6588
Print_ISBN :
978-1-4577-2031-4
Type :
conf
DOI :
10.1109/ICUWB.2012.6340471
Filename :
6340471
Link To Document :
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