FMCW Transceiver Wideband Sweep Nonlinearity Software Correction

Andrei Anghel (1) , Gabriel Vasile (2) , Remus Cacoveanu (3) , Cornel Ioana (1) , Silviu Ciochina (3)

1 GIPSA-SIGMAPHY - GIPSA - Signal Images Physique
2 GIPSA-lab - Grenoble Images Parole Signal Automatique
3 UPB - University Politehnica of Bucharest [Romania]

This paper presents a novel sideband 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.

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Andrei Anghel, Gabriel Vasile, Remus Cacoveanu, Cornel Ioana, Silviu Ciochina. FMCW Transceiver Wideband Sweep Nonlinearity Software Correction. RadarCon13 - 2013 IEEE Radar Conference, 2013, Ottawa, Canada. pp.1-5. ⟨hal-00972555⟩