Nonlinearity correction algorithm for wideband FMCW radars

Author

Anghel, Andreea ; Vasile, G. ; Cacoveanu, Remus ; Ioana, Cornel ; Ciochina, Silviu

Author_Institution

Telecommun. & Inf. Technol., Univ. Politeh. of Bucharest, Bucharest, Romania

fYear

2013

fDate

9-13 Sept. 2013

Firstpage

1

Lastpage

5

Abstract

This paper presents a novel nonlinearity correction algorithm for wideband frequency modulated continuous wave (FMCW) radars based on high-order ambiguity functions (HAF) and time resampling. By emphasizing the polynomial-phase nature of the FMCW signal, it is shown that the HAF is an excellent tool for estimating the sweep nonlinearity polynomial coefficients. The estimated coefficients are used to build a correction function which is applied to the beat signal by time resampling. The nonlinearity correction algorithm is tested by simulation and validated on real data sets acquired with an X-band FMCW radar.

Keywords

CW radar; FM radar; polynomials; radar signal processing; FMCW signal; HAF; X-band FMCW radar; correction function; high-order ambiguity functions; nonlinearity correction algorithm; polynomial-phase nature; sweep nonlinearity polynomial coefficient estimation; time resampling; wideband FMCW radars; wideband frequency modulated continuous wave radar; Bandwidth; Chirp; Estimation; Polynomials; Propagation delay; Radar; Voltage-controlled oscillators; Frequency Modulated Continuous Wave (FMCW); High-Order Ambiguity Function (HAF); Nonlinearity Correction; Time Resampling;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference (EUSIPCO), 2013 Proceedings of the 21st European

Conference_Location

Marrakech

Type

conf

Filename

6811456