International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California / FQPSK is the abbreviation for Feher Quadrature Phase Shift Keying (FQPSK)
patented systems [1]. Digcom, Inc. licensed FQPSK products demonstrated significant
spectral saving and RF power efficient robust BER performance advantages. These bit
rate agile modems and Non Linearly Amplified (NLA) transceivers, DSP and hardware
implementations, and in some instances “software-radios” (20kb/s to more than 100Mb/s)
and RF frequency agile (from 150MHz to more than 40GHz) developments and systems
have recently been demonstrated and deployed. The spectral efficiency, i.e., data
throughput capability of the 1st generation of FQPSK, as demonstrated in initial Advanced
Range Telemetry (ARTM) flight tests, approximately doubles while 2nd generation
“FQPSK-2” systems have the potential to quadruple the spectral efficiency of operational
PCM/FM telemetry systems and be backward compatible with the 1st generation of
FQPSK technologies. It is also demonstrated that the spectral efficiency advantage of
FQPSK over that of NLA power efficient GMSK, OQPSK and QPSK modulated
transceivers is in the 50% to 300% range and that the potential spectral efficiency
advantage of FQPSK-2 over GMSK [1] is in the 200% to 500% range.
Based on extensive multi-year studies of alternative solutions for spectral and RF
power efficient, robust BER performance systems, several commercial US and
international organizations, AIAA, CCSDS, NASA, ESA, CCSDS and various programs
of the US Department of Defense (DoD) concluded that FQPSK offers the most
spectrally efficient high performance-high speed proven technology solutions and
recommended FQPSK standardization for several data links. Initial DoD-ARTM Program
Office Air-to-Ground L-band and S-band jet airborne telemetry Test and Evaluation
(T&E) data, obtained during the summer of 1998 are briefly highlighted. These include
simultaneosly tested FQPSK and PCM/FM. In these tests the following ARTM objectives
have been demonstrated: (a) FQPSK approximately doubles the spectral efficiency of
currently operational PCM/FM; (b) The Data Link Performance of these two systems is
comparable. The American Institute of Aeronautics and Astronautics (AIAA) draft
modulation standard recommended to the DoD, NASA and CCSDS, was approved by
the AIAA [23]. The AIAA standard recommends “that FQPSK modulation be
immediately adopted as the interim increment–1 standard.”
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/607395 |
| Date | 10 1900 |
| Creators | Feher, Kamilo |
| Contributors | Digcom, Inc., 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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