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NON-COHERENTLY DETECTED FQPSK: RAPID SYNCHRONIZATION AND COMPATIBILITY WITH PCM/FM RECEIVERS

International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada / A new class of non-coherent detection techniques for recently standardized Feher patented
quadrature phase-shift keying (FQPSK) systems is proposed and studied by computer aided
design/simulations and also verified by experimental hardware measurements.
The theoretical concepts of the described non-coherent techniques are based on an
interpretation of the instantaneous frequency deviation or phase transition characteristics of
FQPSK-B modulated signal at the front end of the receiver. These are accomplished either
by Limiter-Discriminator (LD) or by Limiter-Discriminator followed by Integrate-and-Dump (LD I&D) methods. It is shown that significant BER performance improvements can
be obtained by increasing the received signal’s observation time over multiple symbols as
well as by adopting trellis-demodulation. For example, our simulation results show that a
BER=10^-4 can be obtained for an E(b)/N(0)=12.7 dB.

Identiferoai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/606461
Date10 1900
CreatorsPark, Hyung Chul, Lee, Kwyro, Feher, Kamilo
ContributorsKorea Advanced Institute of Science and Technology, University of California, Digcom, Inc.
PublisherInternational Foundation for Telemetering
Source SetsUniversity of Arizona
Languageen_US
Detected LanguageEnglish
Typetext, Proceedings
RightsCopyright © International Foundation for Telemetering
Relationhttp://www.telemetry.org/

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