Analysis and Mitigation of RF Interference in Air-Launched 2-GHz GPR Ground-Penetrating Radar Antennas

Air-launched ground penetrating Radar (GPR) antennas are useful for analyzing roadway, bridge, and railbed construction at very high speeds since these devices are located at a safe distance from the target. The disadvantage of these antennas versus ground- coupled antennas is an increased susceptibility to radio and broadcast interference, predominantly from FM and TV broadcasting as well as cellular telephone base stations. A novel hardware/software interference removal technique has been developed that allows 2 GHz air-launched antennas to operate in the presence of most broadcast interference sources while maintaining data integrity and measurement capability of the interference-free scenario. The performance of the conventional 2 GHz air-launched antenna is compared to the new interference-rejecting system among the harshest noise-prone highways in the Greater Boston Metropolitan area. For example, the influence of FM broadcast interference, which accounts for 60% of the measurement outages in our particular route, was completely eliminated. Finally, the full set of GPR data, in conjunction with measurements of radio interference ingress, is compared and characterized in order to identify each of the noise sources, their relative impact on measurement data, and the total likelihood of interference-induced outages.

Language

  • English

Media Info

  • Media Type: DVD
  • Features: Figures; Maps; Photos; References; Tables;
  • Pagination: 11p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01152452
  • Record Type: Publication
  • Report/Paper Numbers: 10-2097
  • Files: TRIS, TRB
  • Created Date: Jan 25 2010 10:57AM