International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California / Digital modulation schemes that are power and bandwidth efficient are highly desirable.
After non-linear amplification has been done, signal modulation schemes having constant
or quasi-constant envelopes are not as susceptible to spectral regrowth as those with non-constant
envelopes. Since such distortion generates interference in the adjacent channels,
the power operation of the amplifier in non-constant envelope modulations is typically
backed off, resulting in systems with reduced power efficiency. On the other hand,
constant envelope modulation may have different bandwidth spectra. This paper
examines the statistical characteristics of N-GMSK and N-FQPSK [1] signals to assess
the bandwidth efficiency in the presence of amplifier nonlinearities.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/605306 |
| Date | 10 1900 |
| Creators | Gonzalez, Maria C., Branner, George R. |
| Contributors | University of California |
| 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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