Elimination of out-of-band emissions in Digital Radio Mondiale transmissions using the genetic algorithm

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.