Experimental Results on Interference Mitigation with a 19 Element Array Feed

Author

Warnick, Karl F. ; Waldron, J. ; Landon, J. ; Lilrose, M. ; Jeffs, B.D. ; Fisher, J. Richard ; Bradley, Richard

Author_Institution

Dept. of ECE, Brigham Young Univ., Provo, UT

fYear

2007

fDate

11-16 Nov. 2007

Firstpage

1

Lastpage

5

Abstract

This paper presents experimental results for adaptive spatial filtering of radio frequency interference (RFI) using a 19 element, L-band focal plane array feed on a small (3 meter) reflector. Successful cancellation was observed for simulated stationary and moving RFI sources. Signal and noise response fluctuations (pattern rumble) due to beamformer adaptation was observed to be significantly larger for a moving interferer than for a stationary interferer, which points to the need for specialized signal processing to suppress pattern rumble in the presence of nonstationary RFI.

Keywords

adaptive antenna arrays; adaptive filters; array signal processing; focal planes; interference suppression; radioastronomy; radiofrequency interference; reflector antenna feeds; spatial filters; L-band focal plane array feed; adaptive spatial filtering; beamformer adaptation; large-reflector antenna; nonstationary RFI sources; radio astronomy; radiofrequency interference mitigation; signal processing; adaptive spatial filtering; focal plane array feeds; radio astronomy; radio frequency interference mitigation;

fLanguage

English

Publisher

iet

Conference_Titel

Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on

Conference_Location

Edinburgh

Print_ISBN

978-0-86341-842-6

Type

conf

Filename

4458975