Wide-Dynamic-Range Analog-to-Digital Conversion for HFDF.
Abstract
Progress is reported in the development of the linear predictive coding/high-speed photoconductor sampling switch concept for wide-dynamic-range digitization of wideband HFDF data, using a synchronously driven laser/fiber-optic system. Development activity reported is in the areas of: (1) simulation, modeling, analysis, and demonstration of noise/jammer approach, using linear predictive coding for speech data; (2) assessment of a finite-impulse-response digital filter approach, using a tapped delay line with fixed tap weights and an over-sampled signal to accomplish linear prediction with arbitrary accuracy; (3) analysis of the physical properties of photoconductor switches and sample/track-and-hold circuit parameters as they limit the data word accuracy in an A/D converter application; and (4) current and future development activities. Keywords include: High-frequency direction finder (HFDF), Lasers, Fiber optics, Switches, Linear predictive coding, High-speed photoconductors, Wide-dynamic-range digitization, Noise/jammer cancellation, and Modems.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1986
- Accession Number
- ADA188465
Entities
People
- D. J. Kaplan
- J. M. Speiser
- T. O. Jones
- W. H. Mcknight