Examination of a simple pulse‐blanking technique for radio frequency interference mitigation

[1] Radiometry at L band can be adversely impacted by radio frequency interference (RFI) due to the presence of numerous sources, especially pulsed RFI from radars operating below 1400 MHz. RFI mitigation is very important to deal with this problem. A simple strategy for reducing pulsed RFI, termed “asynchronous pulse blanking” (APB), has been implemented in a digital receiver developed at Ohio State University. This paper presents results from a simulation of the APB algorithm. Several aspects of algorithm use and performance are reported, including means for choosing the algorithm's parameters and the robustness of the method in a realistic RFI environment. Effects of the blanking process on the final output are also examined.

[1]  Steven W. Ellingson,et al.  Mitigation of Radar Interference in L-Band Radio Astronomy , 2003 .

[2]  Amir Leshem,et al.  MULTICHANNEL INTERFERENCE MITIGATION TECHNIQUES IN RADIO ASTRONOMY , 2000, astro-ph/0005359.

[3]  Joel T. Johnson,et al.  Characterization of L-band RFI and implications for mitigation techniques , 2003, IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477).

[4]  Joel T. Johnson,et al.  Design and demonstration of an interference suppressing microwave radiometer , 2004 .

[5]  William H. Press,et al.  Numerical recipes in C , 2002 .

[6]  Joel T. Johnson,et al.  Airborne radio-frequency interference studies at C-band using a digital receiver , 2006, IEEE Transactions on Geoscience and Remote Sensing.

[7]  Joel T. Johnson,et al.  Design of an L-band microwave radiometer with active mitigation of interference , 2003, IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477).

[8]  Joel T. Johnson,et al.  Airborne radio-frequency interference studies at C-band using a digital receiver , 2006, IEEE Trans. Geosci. Remote. Sens..

[9]  Rodolphe Weber,et al.  Spectral detector for interference time blanking using quantized correlator , 1997 .

[10]  P. Friedman,et al.  A change point detection method for elimination of industrial interference in radio astronomy receivers , 1996, Proceedings of 8th Workshop on Statistical Signal and Array Processing.

[11]  S. W. Ellingson.  Characterization of Some L-Band Signals Visible at Arecibo , 2002 .