Cooperative Handheld Location Device Using Signals of Opportunity

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-09-M-1582
Agency Tracking Number: F083-165-0839
Amount: $99,962.00
Phase: Phase I
Program: SBIR
Awards Year: 2009
Solicitation Year: 2008
Solicitation Topic Code: AF083-165
Solicitation Number: 2008.3
Small Business Information
Sigtem Technology, Inc.
1343 Parrott Drive, San Mateo, CA, 94402
DUNS: 869012732
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Chun Yang
 Principal Scientist
 (650) 312-1132
Business Contact
 Chun Yang
Title: President
Phone: (650) 312-1132
Research Institution
We propose to develop a cooperative handheld location device (CHLD) using signals of opportunity (SOOP) to complement and substitute GPS wherever the latter becomes unavailable. Examples of signals of opportunity include the field and/or segment sync codes in digital radio transmissions (e.g., digital TV signals). The proposed cooperative positioning concept includes differential ranges between cooperative devices to the same SOOP source and the relative ranges between the cooperative devices. The cooperation among networked location devices not only allows them to choose the most appropriate positioning mechanism but also provides them with additional measurements to reduce the number of SOOP otherwise required. In addition to data exchange, the radio link between two cooperative devices also allows for estimation of their clock offset and relative ranging. In Phase I, the proposed concepts will be formulated, analyzed, and simulated in computer for performance prediction and engineering tradeoff. The Phase I approach will be translated into hardware/software prototyping in Phase II for testing and demonstration. BENEFIT: When successful, the proposed research will produce a cooperative handheld location device where GPS is not available. This will have great potentials in many military, homeland security, and commercial applications alike for positioning and navigation in urban and indoor environments.

* information listed above is at the time of submission.

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