Agency: Department of Defense | Branch: Defense Advanced Research Projects Agency | Program: SBIR | Phase: Phase I | Award Amount: 99.00K | Year: 2011
With the advent of Google"s open Android development environment, it is now possible to inexpensively and rapidly develop new applications (apps) for operation on Android mobile phones. All major cellular service providers now offer Android phone options to their customers and Google maintains an open marketplace where developers can post their applications for customer download. An Apps Marketplace can also be used for rapid distribution of applications to the warfighter. NAVSYS previously developed a JLOC (GPS Jammer Location) system that is currently being widely used by warfighters to provide early detection of GPS jamming on the battlefield and situational awareness on the effect of known GPS jammers. Under this SBIR effort, we shall design and implement a prototype JLOC Android application that performs these functions and integrate this with our JLOC Server. We shall test the ability of a mobile phone to provide JLOC sensor reports using its internal GPS and will solicit warfighter feedback on the utility of the application and develop a Phase II proposal based on this feedback. Under the Phase I Option, we shall provide upgrades to our existing JLOC Server to support an initial operational capability for smart phone users through this JLOC Android application.
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 150.00K | Year: 2014
ABSTRACT: The objective of this effort is to investigate designs and possible options for a PNT Flexible satellite for GPS to enhance position, navigation, and timing (PNT) capabilities at a low cost using small augmentation satellites with limited payload. A desired feature to help overcome GPS coverage issues due to terrain, spoofing, jamming and interference is to broadcast military signals at a higher power than the civilian signals. When operating using a saturated traveling wave tube amplifier (TWTA), for example, the behavior of this amplifier very nearly approaches an ideal limiting amplifier. Due to the suppression characteristics of the amplifier, input signals have to be amplitude-balanced in order to prevent the loss of signal on weaker signals. Under this SBIR effort we propose to develop an enhanced constant envelope modulation technology for flex-power operation that will provide improved power efficiency using a digital waveform generator and state of the art L-band high power amplifiers (HPA). We shall assemble a lab test environment including digital waveform generation, RF modulation with HPA and GPS UE signal reception to compare the flex-power performance and power savings of this enhanced modulation method with the conventional interplex modulation method currently used by the GPS satellites. BENEFIT: The ability to deliver configurable flex power to GPS signals on-board NavSat or similar GPS satellite vehicles would enable constellation managers the capability to serve the GPS user community with improved signal quality and navigation precision at a fraction of the cost compared to traditional solutions. The ability to adapt to changing requirements and situations with the flex power solution is a dramatic improvement over current capabilities. Due to the cost effectiveness of this solution and the significant improvements this capability would provide, it is anticipated that significant interest will be garnered for this technology and an accelerated transition path toward implementation on future GNSS satellites will be desired.
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase II | Award Amount: 750.00K | Year: 2016
ABSTRACT:The objective of this effort is to investigate designs and possible options for a Position, Navigation, and Timing (PNT) flexible satellite for GPS to enhance PNT capabilities at a low cost. A desired feature to help overcome GPS coverage issues due to terrain, spoofing, jamming and interference is to broadcast military signals at higher power than the civilian signals. Under the Phase I SBIR effort we demonstrated a flexible digital signal modulation approach, termed FlexMod, which modulates large numbers of codes on a single carrier with flexible relative power levels while maintaining a constant envelope modulation output. Under Phase II, we shall implement a FlexMod firmware module and assemble a test set including a prototype Digital Waveform Generator (DWG), GPS constellation simulator and High Power Amplifiers (HPA) for testing with civil and military GPS receivers. This will be used to demonstrate the flex power performance of the enhanced FlexMod modulation method and evaluate the expected M-code power level that FlexMod could deliver with state of the art HPA technology to a GPS receiver through an earth coverage antenna in GPS III.BENEFIT:When combined with digital waveform generation and state of the art L-band high power amplifiers the FlexMod technology will allow for broadcast of multiple GPS codes (civil and legacy) and a high power M-code signal through a single antenna. This would allow for delivery of NavWar high power signals under A2/AD conditions without requiring a separate spot beam on future GPS III satellites. Due to the cost effectiveness of this solution and the significant improvements this capability would provide, it is anticipated that significant interest will be garnered for this technology for future GPS III satellites and payloads.
Agency: Department of Defense | Branch: Army | Program: SBIR | Phase: Phase I | Award Amount: 99.97K | Year: 2011
Under this SBIR NAVSYS proposes to develop a Tamper-Resistant Embedded Configurable Computer System (T-RECCS) suitable for use in small unmanned vehicles to handle their onboard processing requirements. The proposed architecture will utilize a combination of commercial off-the-shelf processing resources, including General Purpose Processors, Digital Signal Processors, Graphics Processor Units and Field Programmable Gate Arrays to serve as a basic computer building block for computation intensive embedded computing systems. The use of state of the art commercial components should result in significant power savings. We propose to implement an active tamper protection approach within this architecture that will protect sensitive information required for the mission from compromise should the unmanned vehicle be captured. Under the Phase I effort we shall develop the system architecture and identify suitable components for integration into the T-RECCS modular architecture. To demonstrate the feasibility of the proposed tamper resistant multiprocessor architecture, a model based design approach will be developed and benchmarks of sample applications needed to execute target detection and tracking, and guidance, navigation and control of the unmanned vehicles in support of their mission will be used to assess the processing resources needed for implementing a prototype system under the Phase II effort.
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase II | Award Amount: 750.00K | Year: 2014
Under the Phase I SBIR effort, we designed a Submersible GPS Enhancement and Playback System (SGEPS) to allow processing of the GPS signals after a submarine has submerged to reduce the time spent on surface for covert operations. This uses a Digital Storage Receiver (DSR) for capturing the GPS RF signals in the surface and a SAASM GPS receiver for the signal playback and processing after the submarine has submerged. The SGEPS data playback is designed to exploit both the anti-jam/anti-spoof signal processing capabilities of the SAASM receiver, combined with innovative anti-jam algorithms to detect and excise interfering signals to enhance the performance of the SGEP processing in a jammed environment. In the Phase II SBIR base effort, we propose designing, building, and testing a prototype SGEPS DSR system to demonstrate the reduced surface exposure and anti-jam performance of the system. In the Phase II option, we will integrate into the SGEPS processor anti-jam algorithms and demonstrate the ability to track GPS signals in a high jamming environment using these innovative anti-jam algorithms to excise the jammer signals and inertial aiding for ultra-tightly-coupled processing of the SAASM raw correlation output data to enhance signal detection in a high jamming environment.