Radio Facsimile. Volume 1
Abstract
This project deals with the possibility of transmitting FAX over radio voice-channels using existing FAX machines and existing radio installations. No modifications or retrofit to FAX machines or radios is considered; however, additional equipment in the form of an interface adapter or modem is allowed. The investigation is primarily concerned with the use of HF radio. This is due to the long-range communication which HF provides. In addition, HF channels present the greatest problems in transmission of FAX signals. VHF and UHF radios present less difficulties. These radios are often used in combination with wire-lines and are sometimes considered part of the wireline channel. This is often the case with mobile radio. Group -1, -2, and -3 FAX are tested on simulated HF channels using the Government's HF simulator at Ft. Monmouth, N.J. The major degradations for which tests are run include: thermal noise, man-made noise, flat fading, selective fading, and frequency translation. Composite tests, including a number of these degradations, are also made. Volume II of this report includes the actual test results.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1987
- Accession Number
- ADA198806
Entities
People
- Dennis Bodson
Organizations
- Delta Information Systems (United States)