Accession Number : AD0869973

Title :   Coding for Turbulent Channels. Volume V: Measured Performance of Coding Techniques.

Descriptive Note : Final technical rept.,

Corporate Author : GENERAL ELECTRIC CO SYRACUSE NY HEAVY MILITARY ELECTRONIC SYSTEMS

Personal Author(s) : Mitchell, M. E.

Report Date : APR 1970

Pagination or Media Count : 61

Abstract : The error control performance of a simple forward error correction (FEC) coding technique was tested with multilevel vestigial sideband (VSB) modulation and adaptive time-domain equalization on selected circuits of the General Electric DIAL COMM telephone network. The multilevel VSB modulation (to achieve high bit rates) and adaptive time-domain equalization (to reduce intersymbol interference) were provided by an experimental Bell System data set (model X203). The FEC coding technique consisted of an interleaved (24, 12) code to correct random and burst errors. The detailed results of the tests are presented in the form of curves of the distribution of call error rates measured for the VSB modem with and without coding for selected channel bit rates, call durations, and paths through the DIAL COMM network. These curves are discussed and compared to corresponding curves derived from earlier tests of VSB and FSK modems on switched telephone circuits. (Author)

Descriptors :   *CODING), (*PULSE COMMUNICATIONS, (*TELEPHONE SYSTEMS, RELIABILITY(ELECTRONICS)), DATA TRANSMISSION SYSTEMS, COMPUTER PROGRAMMING, DIGITAL SYSTEMS, TROPOSPHERE, DECODING, SIMULATION, DEMODULATORS, ERRORS.

Subject Categories : Cybernetics
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE