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Evaluation of prediction accuracy for the Longley-Rice model in the FM and TV bands

Lazaridis, Pavlos, Bizopoulos, Aristotelis, Kasampalis, Stylianos, Cosmas, John and Zaharis, Zaharias D. (2013) Evaluation of prediction accuracy for the Longley-Rice model in the FM and TV bands. In: XI International Conference – ETAI 2013, 26-28 September 2013, Lake Ohrid, FYR of Macedonia.

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Accurate geographical coverage predictions
maps for FM and TV are needed for channel and
frequency allocations and in order to avoid unwanted
interferences. The Longley-Rice model has been used
for this purpose over the last four decades and still
being used almost exclusively by the FCC in the
United States. In this work a comparison is presented
between the relative accuracy of this model in the
VHF-FM and UHF-TV frequency bands. Simulations
were made with accurate and up to date input data
(antenna height, location, gain, transmit power, etc.)
for the FM-TV stations provided by the ERT S.A.
public broadcaster in the region of Thessaloniki –
Greece. Finally, the calculated – simulated results
were confronted to field measurements using a Rohde
& Schwarz FSH3 portable spectrum analyzer and
high precision calibrated biconical and log-periodic
antennas, and the errors between predictions and
measurements were statistically analyzed in the two
frequency bands. It has been found in this study that
the Longley-Rice model, in general, overestimates
field-strength values, but this overestimation is much
higher in the VHF – FM radio band (88-108 MHz)
than in the UHF-TV band (470-790 MHz).

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Schools: School of Computing and Engineering
Related URLs:
Depositing User: Pavlos Lazaridis
Date Deposited: 09 Oct 2014 13:54
Last Modified: 28 Aug 2021 18:53


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