Title :
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
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;
Conference_Titel :
Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on
Conference_Location :
Edinburgh
Print_ISBN :
978-0-86341-842-6
