Feasibility Study of GPS-Inertial Navigation for Helicopters and Study of Advanced GPS Signal Processing Techniques. Volume III.
Abstract
This report is presented in two parts. Part 1 presents the results of a feasibility study of a low-cost integrated GPS-inertial (strapdown) navigation system for Army attack helicopters. The conclusion is reached that a GPS-Doppler navigation system can more easily attain the cost and performance goals. It was also concluded that an integrated GPS-Doppler-inertial system might be very attractive if it could be used for providing attitude and heading reference data as well as navigation data. There would be a cost savings association with avoiding the need for the usual attitude and heading reference systems. Moreover, the integrated GPS-Doppler-inertial system would have excellent performance in the presence of aircraft dynamics and jamming. Part 2 presents the results of a study of advanced GPS signal processing techniques. Covered in the study are data aiding, comparison of phase-locked loops with Costas loops, variable predetection bandwidths in code-tracking loops, code loop dithering, aided tracking, variable tracking bandwidths, and effective gains of detectors in the presence of noise. The results are from computer simulation and theoretical analysis. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1978
- Accession Number
- ADA057659
Entities
People
- Bernard A. Kriegsman
- Duncan B. Cox Jr.
- Johnn Kishel
- Luigi V. Calicchia
- William M. Stonestreet
Organizations
- Charles Stark Draper Laboratory