A Matched Filter Algorithm for Acoustic Signal Detection.
Abstract
This thesis is a presentation of several alternative acoustic filter designs which allow Space Shuttle payload experiment initiation prior to launch. This initiation is accomplished independently of any spacecraft services by means of a matched band-pass filter tuned to the acoustic signal characteristic of the Auxiliary Power Unit (APU) which is brought up to operating RPM's approximately five minutes prior to launch. These alternative designs include an analog filter built around operational amplifiers, a digital IIR design implemented with an INTEL 2920 Signal Processor, and an Adaptive FIR Weiner design. Working prototypes of the first two filters are developed and a discussion of the advantage of the 2920 digital design is presented. Keywords include: Analog filter; Digital Filter; Bilinear Transform; Space Shuttle; Auxiliary Power Unit; INTEL 2920 Analog Signal Processor; Adaptive Linear combiner; and Adpative Transversal Filter.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1985
- Accession Number
- ADA158960
Entities
People
- D. W. Jordan
Organizations
- Naval Postgraduate School