---------- NGA ----------

4 Phase I Selections from the 07.3 Solicitation

(In Topic Number Order)
MAYFLOWER COMMUNICATIONS CO., INC.
20 Burlington Mall Road
Burlington, MA 01803
Phone:
PI:
Topic#:
(781) 359-9500
Mr. George Dimos
NGA 07-001      Awarded: 01/24/08
Title:High-Sensitivity Military GPS Receivers for Ground-Users
Abstract:This proposal addresses the NGA SBIR program objective to develop and demonstrate GPS receiver improvements for ground users to provide significant "high-sensitivity" signal tracking performance over conventional military GPS receivers. The proposed system consists of (i) the Mayflower "NavAssure" SAASM GPS receiver; and (ii) receiver software signal processing enhancements, in order to mitigate weak signal-to-noise ratio (SNR) conditions by increasing the effective SNR and lowering the tracking SNR threshold. Mayflower is developing the "NavAssure" single chip SAASM GPS receiver (under the Navy GIF SBIR III program) which is expected to be available in 2009 at a production cost of about $500 and typical power consumption of significantly less than 0.5 Watt. In this program, Mayflower plans to develop high-sensitivity algorithms for signal acquisition, tracking, and navigation to obtain about 20 dB SNR improvement compared to conventional military GPS receivers. The specific performance goals for the High-Sensitivity NavAssure SAASM GPS receiver are: (i) direct P(Y) signal acquisition at -160 dBm (10 dBHz C/No) with accurate PVT (i.e. from existing navigation mode or accurate time/data transfer), and (ii) P(Y) signal tracking and navigation at -160 dBm with low dynamics. The Phase I study will quantify the performance benefits of the proposed enhancements and demonstrate the feasibility of signal acquisition and tracking in low-SNR applications. The follow-on Phase II effort will implement these enhancements in software on the NavAssure SAASM GPS receiver platform, and demonstrate their effectiveness in low-SNR applications.

NAVSYS CORP.
14960 Woodcarver Road
Colorado Springs, CO 80921
Phone:
PI:
Topic#:
(719) 481-4877
Dr. Alison Brown
NGA 07-001      Awarded: 01/24/08
Title:High-Sensitivity Military GPS Receivers
Abstract:Many military users need to operate in areas where GPS signal reception is impeded by building walls, dense foliage and urban canyon. Current military GPS receivers do not operate robustly in these environments which include multipath and varying signal levels caused by partial blockage/non-penetration of signals through different materials. Some vendors in the commercial sector, however, have been fielding so-called "High-Sensitivity Receivers" that can track GPS signals 30 dB below conventional civilian/military GPS receivers allowing operation in environments where GPS satellites are blocked or severely attenuated. The objective of this Phase I SBIR effort is to design, develop, simulate, implement, and test GPS receiver software algorithms that provide significant "high-sensitivity" signal tracking performance over conventional military GPS receivers. We propose to achieve this through the development of an innovative multipath mitigating, high sensitivity tracking algorithm that can be implemented as an add-on to a SAASM receiver. Under Phase I we shall develop this algorithm design and conduct analysis and simulation to demonstrate the feasibility, technological challenges, advantages, and disadvantages of our proposed approach. We shall also develop a design for a Phase II prototype receiver and assess potential military users who could benefit from a high sensitivity military GPS receiver.

TRX SYSTEMS, INC.
387 Technology Drive, Suite 2104
College Park, MD 20742
Phone:
PI:
Topic#:
(301) 405-5836
Dr. Carole Teolis
NGA 07-002      Awarded: 01/28/08
Title:Small, Low Power Alternative PNT Augmentations for Handhelds
Abstract:Navigation in GPS denied environments presents a challenge to the war-fighter. Whether accurate GPS locations are unavailable because of jamming or simply because of poor satellite visibility due to manmade or natural structures blocking the signals, it is important to have a reliable alternative precision navigation and time (PNT) augmentation technology. This proposed work addresses the challenges of design and development of small, low cost, low power sensor systems that can provide alternative PNT augmentation sensor information to meet future Protection of Navigation (PRONAV) requirements.

YOTTA NAVIGATION CORP.
3365 Mauricia Avenue
Santa Clara, CA 95051
Phone:
PI:
Topic#:
(408) 242-7026
Dr. William Deninger
NGA 07-002      Awarded: 01/28/08
Title:Alternative PNT Augmentations for Handhelds
Abstract:Yotta Navigation proposes to develop the MOUTman, a rugged, handheld, secure, high-precision real-time navigation system suitable for military operations. This system will take advantage of Yotta's existing expertise in several areas: inertial and differential GPS-assisted navigation, user interface design, efficient integration of components from mainstream suppliers, and our deep knowledge of real-time systems. The primary tracking device will maximize the use of recent advances in commercial-off-the-shelf (COTS) Micro-Electro-Mechanical Systems (MEMS) technologies. It will be extensible and allow for future anticipated GPS Modernization improvements, especially the evolution of military P(Y) capable devices to support M-Code. Components of the test system will closely match the existing GPS infrastructure already in place to support the warfighter, with a natural transition path from the legacy PLGR and DAGR units. Yotta's modular, extensible approach will bring consistently reliable sub-meter dynamic positioning and attitude, high-data rate throughput in excess of ten (10) hertz, and the ability to track horizontal and vertical position even in the total absence of GPS. Because the proposed SBIR solution can be built around an existing Yotta solution platform and architecture, a field-testable prototype system is achievable by the end of the Phase I. This Phase I effort will culminate in a high-quality proof-of-concept design, testable prototype, and quantifiable performance results. The approach will also permit significant time for testing, optimizations and enhancements during Phase II.