Title :
Influence of RF oscillators on an OFDM signal
Author :
Muschallik, Claus
Author_Institution :
Adv. RF-Lab. VRF, Thomson Multimedia, Villingen, Germany
fDate :
8/1/1995 12:00:00 AM
Abstract :
This paper explains the mechanisms that lead to a degradation of an OFDM signal because of the phase noise of the RF oscillators. An approach for easy calculation of SNR, independent of carrier numbers, will be given. This SNR approach uses a plot of the phase noise power density for the calculation. The theoretical results lead to an improved synthesizer concept. Values of SNR and BER will be given for the new synthesizer concept
Keywords :
digital phase locked loops; digital television; discrete Fourier transforms; frequency division multiplexing; phase noise; quadrature amplitude modulation; radiofrequency oscillators; television broadcasting; television equipment; television receivers; tuning; video signal processing; 64 QAM; BER; OFDM signal; PLL; RF oscillators; SNR; TV systems; broadcasting; carrier numbers; digital TV; discrete Fourier transform; mechanisms; phase noise; phase noise power density; signal degradation; synthesizer concept; Demodulation; Discrete Fourier transforms; OFDM modulation; Phase noise; RF signals; Radio frequency; Signal to noise ratio; Synthesizers; Tuners; Voltage-controlled oscillators;
Journal_Title :
Consumer Electronics, IEEE Transactions on
