Title :
Elimination of out-of-band emissions in Digital Radio Mondiale transmissions using the genetic algorithm
Author :
Grubesa, Tomislav ; Orlic, Niksa ; Grubesa, Sanja
Author_Institution :
RIZ Transmitters Co., Zagreb
Abstract :
When transmitting high-power digital radio Mondiale (DRM) signal from non-linear transmitters, out-of-band emissions are the critical problem since the emitted spectrum does not satisfy spectral mask defined in relevant standards. Several methods have been developed that minimize out-of-band emissions, based on adding spectrally formed impulses to the signal, thus causing high non-selective distortion of modulation characteristics of the digital signal. In order to reduce the amount of those distortions, a new method has been developed for partial elimination of out-of-band emissions by preprocessing signal in digital domain prior to orthogonal frequency-division multiplexing (OFDM) signal construction.
Keywords :
OFDM modulation; digital radio; genetic algorithms; OFDM signal construction; digital domain; digital radio Mondiale transmissions; digital signal modulation characteristics; genetic algorithm; nonlinear transmitters; orthogonal frequency-division multiplexing; out-of-band emission elimination; out-of-band emissions; spectral mask; Amplitude modulation; Bandwidth; Digital Radio Mondiale; Digital communication; Genetic algorithms; Nonlinear distortion; OFDM modulation; Quadrature amplitude modulation; Radio transmitters; Radiofrequency amplifiers; digital radio; genetic algorithms; signal processing;
Conference_Titel :
Information Technology Interfaces, 2008. ITI 2008. 30th International Conference on
Conference_Location :
Dubrovnik
Print_ISBN :
978-953-7138-12-7
Electronic_ISBN :
1330-1012
DOI :
10.1109/ITI.2008.4588500