Low Probability of Intercept/Low Probability of Detection (LPI/LPD) and Radio Frequency Interference (RFI) Mitigation Techniques

Award Information
Agency: Department of Defense
Branch: Army
Contract: W15P7T-04-C-F404
Agency Tracking Number: A032-0514
Amount: $69,669.00
Phase: Phase I
Program: SBIR
Awards Year: 2004
Solicitation Year: 2003
Solicitation Topic Code: A03-101
Solicitation Number: 2003.2
Small Business Information
TECHNOLOGY SERVICE CORP.
1900 S. Sepulveda Blvd., Suite 300, Los Angeles, CA, 90025
DUNS: 053885604
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Joseph Salzman
 Principal Staff
 (310) 954-2200
 jsalzman@tsc.com
Business Contact
 Michael Syracuse
Title: Chief Financial Officer
Phone: (301) 565-0306
Email: msyracuse@tsc.com
Research Institution
N/A
Abstract
RFI and signal security are indelibly intertwined in military FOPEN radar systems. RFI is a dual problem for FOPEN radars: on transmit, the radar signal interferes with other friendly systems operating in the same band; on receive, these systems' signals interfere with radar operations. A common solution to dealing with both RFI manifestations is to notch the RFI signal. However, a piori knowledge of the spectral characteristics of the friendlies in the region, which is acquired by a "sniff" mode or is available before radar operations, is crucial. Furthermore, notching distorts the received signal, degrading the performance of the radar, if not corrected for. TSC proposes an LPI/LPD waveform design to alleviate the RFI problem with minimal distortion when RFI information is available, while providing signal security. When information is unavailable, RFI is detected, notched, and autoregressive filtering applied to recover the target signals. TSC has investigated and developed a variety of LPI/LPD waveforms in the past, and applied AR techniques to recover corrupted SAR and other radar signals. During Phase I, TSC will investigate the feasibility of these RFI mitigation techniques, and develop tools and plans for Phase II demonstration tests utilizing a GeoSAR UHF transmitter in TSC's possession.

* information listed above is at the time of submission.

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