Deeply Integrated GPS/INS Navigation System

Period of Performance: 11/06/2013 - 05/03/2014


Phase 1 SBIR

Recipient Firm

Qunav LLC
324 Sudduth Cir NE Array
Fort Walton Beach, FL 32548
Principal Investigator


Qunav and its subcontractor, Northrop Grumman Electronic Systems (NGES), propose to prototype and transition a deeply integrated GPS/INS navigation (DIGINAV) system in support of the Navy Warfighter. DIGINAV is based on three technological innovations: (i) deep integration with mutual GPS/INS aiding, (ii) high-sensitivity GPS baseband signal processing, and (iii) software-defined M-code GPS receiver with an open architecture compatible with other anti-jam (AJ) anti-spoofing options, future signals and other sensor integrations. Existing test results indicate strong AJ capabilities of DIGINAV, stemming from its extremely long coherent integration (LCI) of received GPS signals (e.g., 1 second). LCI eliminates squaring loss of traditional 20-ms integration, thus providing 8~10 dB AJ gain as compared to other deep integration and ultra-tightly coupled solutions that limit their coherent integration to 20 ms. Phase I will demonstrate the deeply-integrated signal processing software and its capabilities with experimental data and perform a proof-of-concept functionality demonstration with an external SAASM card in a real-time mode. Partnering with NGES, Qunav will optimize DIGINAV within a navigation processor card to satisfy SWAP requirements of UAS and PGM applications. The DIGINAV development status currently corresponds to TRL 4. Phase I and Phase II efforts will bring the technology into TRL 6.