Performance limitations in an OFDM system due to non-linearities (CROSBI ID 687862)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Zentner, Ervin ; Zentner Pilinsky, Sonja
engleski
Performance limitations in an OFDM system due to non-linearities
The third order intermodulation products in OFDM systems caused by nonlinear analog circuits are presented. These impairments result in inter-bin interference (IBI) which causes errors in the constellation diagram of each subcarrier. Changes in amplitude and phase of the subcarriers by IBI combined with communication system noise can cause increased bit error rate (BER) in the demodulation process of some modulation types, particular for higher order types where one symbol consist of more bits. Because the Fourier Transform is a fundamental operation in processing subcarriers in OFDM systems we have analyzed the inter-bin interference by means of FFT, IFFT and some statistical methods to clarify the statistical behavior of the errors. We have try to fit the statistics of the amplitude and phase errors of each subcarrier with a known probability density function and investigated the influence of peak-to-average ratio (PAR) on IBI
modulation, mobile networks, transmission quality, signal processing
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Podaci o prilogu
255-258.
2009.
objavljeno
Podaci o matičnoj publikaciji
Proceedings of ELMAR-2009
Grgić, Mislav ; Božek, Jelena ; Grgić, Sonja
Zagreb: Fakultet elektrotehnike i računarstva Sveučilišta u Zagrebu
978-953-7044-10-7
1334-2630
Podaci o skupu
51th International Symposium ELMAR-2009
predavanje
28.09.2009-30.09.2009
Zadar, Hrvatska