International Telemetering Conference Proceedings / October 26-29, 1992 / Town and Country Hotel and Convention Center, San Diego, California / Telemetry operation is used extensively on a typical Department of Defense (DOD) test
range to transfer data from an airborne transmitter to a ground receiver. The conventional
telemetry systems employed are usually narrow-band systems. When a large number of
airborne transmitters need to transfer data simultaneously to a ground station, a spread
spectrum modulation scheme can be used. The drawback of such a scheme, however, is
the large emission bandwidth required. The present frequency channeling plans in the
telemetry band do not support frequency approval of large bandwidth data telemetry
systems. However, a key requirement for obtaining the frequency approval can be satisfied
if it can be shown that the spread spectrum modulated signal does not interfere with other
systems in the same band. That is, the spread spectrum telemetry systems (SSTS’s) are
feasible if these systems are electromagnetically compatible with the existing narrow-band
telemetry receivers (NBTR’s) in their immediate environment. The electromagnetic
compatibility (EMC between the SSTS transmitters and the conventional NBTR would
promise the beginning of a new era for the telemetry operations on a DOD test range.
This paper develops a methodology to establish the EMC between multiple airborne
transmitters of an SSTS employing the code division multiple access (CDMA) technique
and a ground-based conventional NBTR on a typical DOD test range operating
simultaneously in the same band. The paper calculates the electromagnetic interference
(EMI) levels between the SSTS and the NBTR to establish the EMC between the two
systems.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/608914 |
| Date | 10 1900 |
| Creators | Mohd, Maqsood A., McLaughlin, James J. Jr |
| Contributors | Eglin Air Force Base |
| Publisher | International Foundation for Telemetering |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Proceedings |
| Rights | Copyright © International Foundation for Telemetering |
| Relation | http://www.telemetry.org/ |
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