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Anti-Jam GPS Receiver Architecture Using Available Antennas

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9453-06-M-0182
Agency Tracking Number: F061-276-3913
Amount: $99,107.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: AF06-276
Solicitation Number: 2006.1
Solicitation Year: 2006
Award Year: 2006
Award Start Date (Proposal Award Date): 2006-04-07
Award End Date (Contract End Date): 2007-04-17
Small Business Information
3702 Pender Drive, Suite 170
Fairfax, VA 22030
United States
DUNS: 153857495
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: Yes
Principal Investigator
 Suman Ganguly
 (703) 385-7717
Business Contact
 Suman Ganguly
Title: President
Phone: (703) 385-7717
Research Institution

With increasing reliance on GPS, precise navigation in the presence of jamming is essential. Controlled Reception Pattern Antennas (CRPA’s) provide adaptive beamforming to project nulls towards the jammers. CRPA’s typically consist of multiple elements in a certain manifold with phase between elements adjusted for desired beam patterns. Many vehicles are not equipped with CRPA, but have multiple antennas for robust navigation (under maneuvering) and attitude determination. These antennas could be used to provide anti-jam performance against a single or multiple (depending on number and orientation of antennas) jammers. This proposal describes a plan to develop such a system. Anti-jam techniques involving phase (DFT) and time based approaches (TDOA) coupled with constrained beamforming/beam-steering will be simulated to determine the direction of arrival and null the jammer(s) under different conditions. In addition, a GPS/MEMS-INS will be integrated into the system simulation to provide enhance jammer resistance. In Phase I an anti-jam receiver will be developed and simulated in software using a simulation environment (IMPULSE™). Performance metrics obtained will be used to compare anti-jam margins in different jamming conditions versus a CRPA array. This system simulation will provide a framework to develop a working prototype that will be field tested during Phase II.

* Information listed above is at the time of submission. *

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