The Astre - An Electronic Real-Time Statistical Analyzer
Abstract
The Laboratory has developed the Astre, an interim model of an electronic real-time statistical signal analyzer. The primary purposes in building the analyzer were to develop adequate means for making statistical measurements in real time corresponding to certain specified probability distributions, to automatize the routine and repetitive parts of the statistical analysis of time series, and to expedite decisions relating to a time series by measurements made on a portion of it. The real-time approach precludes the necessity for recording equipment that is usually required for autocorrelation and crosscorrelation point-by-point techniques. The concern here is mainly with a binary stream of information and the measures corresponding to autocorrelation, crosscorrelation, distribution of runs and patterns, and the Bernoulli distribution. The system is designed for synchronous operation at communication information rates from any constant-rate real-time signal source, or from a variable-rate source with rate information available, such as in the associated continuously driven paper tape input. Provision is made for selection of total sample size for all programs, and of class interval for the appropriate program. In addition to cross checks built into each program, certain checks are available by switching to test the shift register delay line, detectors, integrators, and related circuits for marginal operation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 12, 1957
- Accession Number
- AD1223309
Entities
People
- H. M. Beck
- M. Fischman
Organizations
- United States Naval Research Laboratory