June 1990 | Technical Report TR-90-265-2
Long–Term Performance and Propagation Measurements on Single and Tandem Digital Microwave Transmission Links, Volume II: Appendixes
Cite This Publication
James A. Hoffmeyer and Timothy J. Riley, “Long–Term Performance and Propagation Measurements on Single and Tandem Digital Microwave Transmission Links, Volume II: Appendixes,” Technical Report TR-90-265-2, U.S. Department of Commerce, National Telecommunications and Information Administration, Institute for Telecommunication Sciences, June 1990.
James A. Hoffmeyer and Timothy J. Riley
Abstract:
This report describes the results of an 18-month digital microwave radio performance and propagation measurement project· that was conducted on a portion of the Defense Communications System in Germany. More than 6 gigabytes of data were collected between April 1988 and October 1989.
The collected data include end-to-end (user-to-user) performance data, radio performance and propagation data on one line-of-sight and one troposcatter link, and meteorological data. The end-to-end measurements are referred to as the Network Performance Characterization (NPC) data, and consist of error performance measurements on two separate 64 kb/s channels consisting of tandem terrestrial microwave links. The radio performance and propagation measurements are referred to as the Link Performance Characterization (LPC) data. These data consist of digital radio performanf:e and propagation measurements made on a long (99-km) line-of-sight microwave link. The propagation measurements on this link include multipath delay spread, in-band power difference (IBPD) , and receive signal level (rsl) measurements.
The report provides summaries of the long-term statistics of both radio performance and propagation data. The performance data are compared with both CCITT and Military Standard (MIL-STD) performance criteria. The propagation data are used in the assessment of the causes of digital radio outages. The propagation data are also useful for a variety of modeling purposes. These applications of the propagation data are described in the report.
Keywords: multipath fading; propagation measurements; CCITT; DEB; Digital European Backbone; DRAMA; digital radio performance; LOS propagation; radio outages; transmission system performance standards; troposcatter; digital microwave radio; IBPD; in-band dispersion; linear amplitude difference; MIL-STD
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