Spectral Efficiency and Adjacent Channel Interference Performance Definitions and Requirements for Telemetry Applications
University of California
Edwards Air Force Base
Keywordsadjacent channel interference (ACI)
Feher patented Quadrature Phase Shift Keying (FQPSK)
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AbstractOrganizations such as the National Telecommunications and Information Administration (NTIA), Federal Communications Commission (FCC), International Telecommunications Union (ITU) and various commercial entities use a wide range of spectral efficiency criteria in different broadcast and wireless system applications. These criteria and related specifications have significant differences. This paper briefly reviews some common adjacent channel interference (ACI) definitions as well as issues surrounding the definition of spectral efficiency. The impact of these parameters on system bit error rate (BER) performance and closely "packed" adjacent signals is described. ACI criteria and spectral efficiency definitions considered appropriate for existing telemetry applications and deployment of new generations of spectrally efficient systems are illustrated. Specific ACI and spectral efficiency performance requirements adopted by the Department of Defense (DoD) and Advanced Range Telemetry (ARTM) project are highlighted.
SponsorsInternational Foundation for Telemetering