Accession Number:

ADA067538

Title:

Modem Identification Experiments.

Descriptive Note:

Rept. for Jan-Aug 78,

Corporate Author:

ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y

Personal Author(s):

• Fernandez,Jorge A.

Report Date:

1979-02-01

Pagination or Media Count:

79.0

Abstract:

This report describes the design and evaluation of classifiers for distinguishing four types of modems the CODEX LXI-9600, the HUGHES HC-276, the PARADYNE LSI-96, and LENKURT 26-C. The data used to develop these classifiers consisted of many digitized time sample waveforms for each modem and was collected by RADCs Digital Communication Experimental Facility DICEF. With the Waveform Processing System WPS capabilities, the Interactive Processing Section of the Information Sciences Division ISCP analyzed this waveform data and extracted an initial set of eighty features. This initial set was later modified to fifty features. The On-Line Pattern Analysis and Recognition System OLPARS was then used to develop a number of classifier designs which are based on different subsets of the initial fifty features. Author

Descriptors:

• *PATTERN RECOGNITION
• *MODEMS
• COMPUTER PROGRAMS
• ALGORITHMS
• CLASSIFICATION
• DATA ACQUISITION
• INPUT OUTPUT DEVICES
• ONLINE SYSTEMS
• PHASE SHIFT KEYERS
• DIGITAL COMPUTERS
• PSEUDO RANDOM SYSTEMS

Subject Categories:

• Electrical and Electronic Equipment
• Computer Programming and Software
• Computer Hardware
• Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE