International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada / A typical PCM/FM system is designed for a peak to peak carrier deviation of 0.7
times the bit rate of the PCM data. This value of PCM data deviation has been shown
to be optimum for both PCM/FM [1] and PCM/FM+FM/FM [2] systems. However,
the optimum deviation of the carrier by the FM subcarrier for a PCM/FM+FM/FM
system is dependent upon the specific subcarrier type and required subcarrier signal to
noise ratio at the receiver output.
This paper introduces a simple method to calculate the optimum deviation of the
carrier by FM subcarriers for a PCM/FM+FM/FM system. The method developed is
used to calculate the optimum value of subcarrier deviation for two sample
PCM/FM+FM/FM systems when IRIG constant bandwidth channels are used as FM
subcarriers. The calculated optimum values of FM subcarrier deviation of the carrier,
subcarrier mod index, are utilized in a companion paper to study the performance of
PCM/FM+FM/FM systems [3].
The work presented herein can be extended to calculate the optimum deviation of the
carrier by FM subcarriers for any PCM/FM+FM/FM system.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/608851 |
| Date | 10 1900 |
| Creators | Osborne, William P., Whiteman, Donald E. |
| Contributors | New Mexico State University |
| 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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