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http://dx.doi.org/10.14400/JDC.2017.15.4.275

TACAN modulation generator for antenna purpose that precisely adjusts factor of modulation  

Kim, Jong-Won (Dept. of Computer Science & Engineering, Kongju National University)
Son, Kyong-Sik (Dept. of Computer Science & Engineering, Kongju National University)
Lim, Jae-Hyun (Dept. of Computer Science & Engineering, Kongju National University)
Publication Information
Journal of Digital Convergence / v.15, no.4, 2017 , pp. 275-284 More about this Journal
Abstract
TACAN(TACtical Air Navigation) was created to support military aircraft's short range navigation (200~300 mile). TACAN must fulfill a condition of MIL-STD-291C, the U.S. Military Standards, which addresses the sum of 15Hz and 135Hz should be within 55%, following the factor of modulations for both to be $21{\pm}9%$ each. Within the existing TACAN antenna, modulation factor for 15Hz and 135Hz are created differently depending on its diameter, wavelength, angle of gradient, internal modulation method or using frequency code. It brings up a problem where applications needed to be stopped and repaired when modulating signal exceeds the standard of MIL-STD-291C since the existing TACAN antenna does not have coordination function. Hence, plan and produce a modulating signal generator using FPGA, and check the changes in the modulation factor for 15HZ and 135Hz, depending on the values that have been set in each criteria. Moreover, allow the modulating signal generator to be automatically adjusted based on the monitoring signal emitted by antenna, and place alarm sound just in case if it exceeds the standard.
Keywords
TACAN; Antenna; Azimuth information; Modulating signal; Modulation factor;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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