Accession Number : ADA019839

Title :   Navair 9600 Baud Radio Modem.

Descriptive Note : Final rept.

Corporate Author : HONEYWELL COMMUNICATIONS DEVELOPMENT CENTER ST PETERSBURG FLA

Report Date : 30 NOV 1969

Pagination or Media Count : 156

Abstract : This document presents the results of a theoretical investigation to determine the feasibility of developing a 9600 bit per second modem suitable for data transmission and reception on narrowband HF and UHF channels. Two modem techniques were considered: the Honeywell Digital Modulation System (HDMS) and the Automatically Real-Time Equalized Modem (ARTEM). The HDMS technique, which employs a form of correlated phase shift keying in a conventional FDM subchannel format, was found to be incapable of achieving reliable 9600 bit per second operation through the narrowband HF channel. The ARTEM technique, which employs single channel PAM-VSB modulation with automatic channel measurement and equalization, was found to hold great promise as a technique for achieving and desired 9600 bit per second operation.

Descriptors :   *Modems, Data transmission systems, Narrowband, High frequency, Data rate, Ultrahigh frequency

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE