Title :
Adaptive Frequency Sweep Linearization based on Phase Accumulator Principle
Author :
Wagner, Christoph ; Stelzer, Andreas ; Jäger, Herbert
Author_Institution :
Johannes Kepler Univ., Linz
Abstract :
A novel approach to in-system monitoring of frequency sweep linearity is presented. Phase error measurement is carried out using a phase accumulator such as known from direct digital synthesizers (DDS). The successful application of this monitoring concept in an adaptive frequency sweep linearization system is shown by measurements of a 77-GHz linear frequency modulated continuous wave (LFMCW) radar transmitter.
Keywords :
CW radar; FM radar; adaptive systems; digital-analogue conversion; direct digital synthesis; millimetre wave measurement; millimetre wave oscillators; radar transmitters; voltage-controlled oscillators; DAC; DDS; VCO; adaptive frequency sweep linearization system; direct digital synthesizers; frequency 77 GHz; in-system monitoring; linear frequency modulated continuous wave radar transmitter; phase accumulator principles; phase error measurement; Chirp modulation; Frequency measurement; Frequency modulation; Linearity; Monitoring; Phase measurement; Radar applications; Radar measurements; Synthesizers; Transmitters; 77-GHz; LFMCW radar; frequency sweep linearization;
Conference_Titel :
Microwave Symposium, 2007. IEEE/MTT-S International
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0688-9
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2007.380437
