ADVANCED DIGITAL PROCESSING TECHNIQUES.
Abstract
The objective of the study program was to explore several digital processing areas and investigate the salient problems associated with each. These areas under consideration included digital matched filtering, digital bandpass filtering, lowpass sampling and rapid processing. The nature of the problem of digitally filtering or extracting narrowband information from a broadband signal is described and three approaches (sampling rate decimation, block delay, staggered sampling) are discussed and illustrated with examples and computer simulations. In order to perform the numerical processing (digital filtering) rapidly, the sequence of arithmatic operations is exploited for all symmetries with specific consideration given to a reordering technique, and coefficient normalization. Two procedures are described for synthesizing filter characteristics in the frequency domain but with the processing accomplished in the time domain. The first matches frequency characteristics (magnitude and phase) of a recursive digital filter at a selectable number of points, the second is a recursive formulation of the Fast Fourier transforms algorithm.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1970
- Accession Number
- AD0708736
Entities
People
- Ira M. Langenthal
- Sankaran Gowrinathan