Title :
Spectral analysis at the output of a TWT driven by an OFDM signal
Author :
Cariolaro, G. ; Michieletto, G. ; Stivanello, G. ; Vangelista, L.
Author_Institution :
Dept. of Electr. Eng., Padova Univ., Italy
Abstract :
The use of high power amplifiers, such as TWTs, at the output of an OFDM modulator is requested when the digital signal is to be transmitted over a broadcasting terrestrial channel. The spectral analysis at the output of a TWT driven by a Gaussian input is carried out and the result is applied to the case of an OFDM signal. Output correlation and spectral density are obtained using the Mahler´s expansion of a Gaussian tetravariate and are then applied to a practical OFDM scheme
Keywords :
Gaussian processes; correlation methods; digital television; frequency division multiplexing; modulators; power amplifiers; spectral analysis; television broadcasting; travelling wave amplifiers; travelling wave tubes; Gaussian input; Gaussian tetravariate; Mahler´s expansion; OFDM modulator; OFDM signal; TV broadcasting; TWT; broadcasting terrestrial channel; digital signal; high power amplifiers; output correlation; spectral analysis; spectral density; Digital modulation; Fading; HDTV; High power amplifiers; OFDM modulation; Radio broadcasting; Signal analysis; Spectral analysis; TV broadcasting; Working environment noise;
Conference_Titel :
Singapore ICCS '94. Conference Proceedings.
Print_ISBN :
0-7803-2046-8
DOI :
10.1109/ICCS.1994.474148
