Title :
Digital back-end for RFI detection and mitigation in microwave radiometers
Author :
Forte, G.F. ; Camps, A. ; Ramos, I. ; Vall-llossera, M.
Author_Institution :
Dept. del Teor. del Senyal i Comunicacions, Univ. Politec. de Catalunya, Barcelona, Spain
Abstract :
Radio-frequency interference (RFI) is a serious problem in microwave radiometry. In order to process the received data in real time, a powerful back-end for RFI detection and mitigation system must be implemented. This system includes many techniques against RFI, like time, frequency domain and spectrogram analysis. A wavelet-based RFI-mitigation technique is implemented in hardware. The interfering signal is estimated by using the powerful denoising capabilities of the wavelet transform. Then, this estimate of the RFI signal is subtracted from the total received signal to obtain a RFI-mitigated noise signal. Statistical analysis helps to validate the mentioned methods.
Keywords :
frequency-domain analysis; geophysical signal processing; interference suppression; microwave detectors; radiofrequency interference; radiometry; signal denoising; statistical analysis; time-domain analysis; wavelet transforms; RFI detection; RFI mitigation; RFI signal estimation; RFI-mitigated noise signal; denoising capabilities; digital back-end; frequency-domain analysis; microwave radiometers; radiofrequency interference; signal interference; spectrogram analysis; statistical analysis; time-domain analysis; wavelet transform; wavelet-based RFI-mitigation technique; Clocks; Field programmable gate arrays; Microwave radiometry; Microwave theory and techniques; Radiofrequency interference; Remote sensing; RFI-mitigation; Radiometry; Wavelet;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International
Conference_Location :
Munich
Print_ISBN :
978-1-4673-1160-1
Electronic_ISBN :
2153-6996
DOI :
10.1109/IGARSS.2012.6350706