Investigations on OFDM Signal for Range Ambiguity Suppression in SAR Configuration

Vishal V. Riché (1) , Stéphane Meric (1) , Jean-Yves Baudais (1) , Eric Pottier (1)

1 IETR - Institut d'Électronique et des Technologies du numéRique

This paper presents an opportunity to cancel range ambiguities in synthetic aperture radar (SAR) configuration. One of the limitations of SAR systems is the range ambiguity phenomenon that appears with long delayed echoes. The reflected signal corresponding to one pulse is detected when the radar has already transmitted the next pulse. Thus, this signal is considered as an echo from the next pulse. This paper investigates the opportunity of coding the transmitted pulses using an orthogonal frequency-division multiplexing pulse. The results show that coded-OFDM signals outperform conventional chirp signal and make it possible to relax constraints placed upon the pulse repetition frequency.

Domaines: Electronique

Vishal V. Riché, Stéphane Meric, Jean-Yves Baudais, Eric Pottier. Investigations on OFDM Signal for Range Ambiguity Suppression in SAR Configuration. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52 (7), pp.4194-4197. ⟨10.1109/TGRS.2013.2280190⟩. ⟨hal-00831837⟩