A microprocessor based anti-aliasing filter for a PCM system
Abstract
Described is the design and evaluation of a microprocessor based digital filter. The filter was made to investigate the feasibility of a digital replacement for the analog pre-sampling filters used in telemetry systems at the NASA Ames-Dryden Flight Research Facility (DFRF). The digital filter will utilize an Intel 2920 Analog Signal Processor (ASP) chip. Testing includes measurements of: (1) the filter frequency response and, (2) the filter signal resolution. The evaluation of the digital filter was made on the basis of circuit size, projected environmental stability and filter resolution. The 2920 based digital filter was found to meet or exceed the pre-sampling filter specifications for limited signal resolution applications.
- Publication:
-
Final Report
- Pub Date:
- October 1984
- Bibcode:
- 1984cpsu.rept.....M
- Keywords:
-
- Digital Filters;
- Flight Tests;
- Microprocessors;
- Telemetry;
- Test Facilities;
- Analog Data;
- Chips (Electronics);
- Signal Processing;
- Stability;
- Communications and Radar