A Double Detector for RFI Mitigation in Microwave Radiometers

Author

Piepmeier, Jeffrey R. ; Mohammed, Priscilla N. ; Knuble, Joseph J.

Author_Institution

NASA Goddard Space Flight Center, Microwave Instrum. Technol. Branch, Greenbelt, MD

Volume

46

Issue

2

fYear

2008

Firstpage

458

Lastpage

465

Abstract

A double detector (DD) for radio-frequency interference (RFI) in microwave radiometers is demonstrated in theory and practice. The detector is based on the principle of using kurtosis to detect the presence of non-Gaussian signals and is shown to approximate the kurtosis of input. Theoretical response to continuous wave and pulsed RFI is derived and tested in two experiments. The DD hardware comprises two microwave detectors, two integrator-amplifiers, and a wideband video amplifier. The technique is compatible with existing direct-detection radiometer designs and desirable for applications requiring low technological risk.

Keywords

geophysical signal processing; geophysical techniques; interference suppression; microwave measurement; radiofrequency interference; radiometry; RFI mitigation; continuous wave; direct detection radiometer design; double detector; integrator amplifiers; kurtosis; microwave radiometer; nonGaussian signals; radio-frequency interference; wideband video amplifier; Broadband amplifiers; Detectors; Hardware; Microwave amplifiers; Microwave theory and techniques; Pulse amplifiers; Radio frequency; Radiofrequency interference; Radiometers; Testing; Kurtosis; radio-frequency interference (RFI); radiometer; signal detection;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/TGRS.2007.909099

Filename

4414350