The Open Automation and Control Systems Journal
2014, 6 : 1547-1554Published online 2014 December 31. DOI: 10.2174/1874444301406011547
Publisher ID: TOAUTOCJ-6-1547
Analyzing Performance of Separating Algorithm on Responsive signals of the Transponders
ABSTRACT
Multiple 1090ES responsive signals may be overlapped in the receiver systems on the ground. At the same time, 1090ES respond signals may be interfered by A/C replies with the same carrier frequency. To address these problems, firstly, principle component analysis (PCA) is employed to pre-whiten the observed signals in order to reduce the relevance between signals. Then extended projection algorithm (EPA) is applied to separate 1090ES respond signals. Effect of the separated signal is verified by simulation. The performance of this algorithm is also analyzed in several aspects. Experiments results show that this algorithm not only can successfully in separating multiple 1090ES responsive signal effectively but also has both higher precision and strong ability of stability.