Title :
FMCW transceiver wideband sweep nonlinearity software correction
Author :
Anghel, Andreea ; Vasile, G. ; Cacoveanu, Remus ; Ioana, Cornel ; Ciochina, Silviu
Author_Institution :
Fac. of Electron., Telecommun. & Inf. Technol., Univ. Politeh. of Bucharest, Bucharest, Romania
fDate :
April 29 2013-May 3 2013
Abstract :
This paper presents a novel wideband sweep nonlinearity software correction method for a frequency modulated continuous wave (FMCW) transceiver based on the high-order ambiguity function (HAF) and time resampling. By emphasizing the polynomial-phase nature of the FMCW signal, it is shown that the HAF processing algorithm is well suited for estimating the sweep nonlinearity coefficients. The estimated coefficients are used to build a correction function which is applied by resampling the beat signal on each sweep interval. The sweep nonlinearity correction procedure is validated on real data acquired with a low-cost X-band T/R module.
Keywords :
polynomials; radio transceivers; software radio; FMCW signal; FMCW transceiver wideband sweep nonlinearity software correction; HAF; T/R module; beat signal; correction function; estimated coefficients; frequency modulated continuous wave; high-order ambiguity function; nonlinearity coefficients; polynomial phase nature; time resampling; Chirp; Delay lines; Software; Synthetic aperture radar; Transceivers; Voltage-controlled oscillators;
Conference_Titel :
Radar Conference (RADAR), 2013 IEEE
Conference_Location :
Ottawa, ON
Print_ISBN :
978-1-4673-5792-0
DOI :
10.1109/RADAR.2013.6586032
