Accession Number : AD0869452

Title :   Implementation and Testing of the Digital Modulation Technique and the Adaptive Equalizer.

Descriptive Note : Final technical rept. Jan 67-Dec 68,

Corporate Author : IBM FEDERAL SYSTEMS DIV GAITHERSBURG MD DATA TRANSMISSION DEPT

Personal Author(s) : Liberman, Richard A. ; Fang, Yang ; Leighton, Howard N.

Report Date : APR 1970

Pagination or Media Count : 239

Abstract : The report presents a description of the implementation and testing of a 4800 and 9600 bit per second data modem developed around an encoding technique called Digital Modulation. Sections 1 through 4 describe the implementation and testing of the modem and manual equalizer, and Sections 5 through 8 describe the implementation and testing of the modem and adaptive equalizer. Provided in this report are theoretical discussions of the Digital Modulation technique and the Adaptive Equalizer, data on phase jitter, Gaussian noise tests, and telephone line tests. (Author)

Descriptors :   *TELEPHONE SYSTEMS), (*DATA TRANSMISSION SYSTEMS, DIGITAL SYSTEMS, AMPLITUDE MODULATION, SINGLE SIDEBAND COMMUNICATIONS, MODULATORS, ERRORS.

Subject Categories : Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE