  Tunka-Rex is detector for radio emission produced by cosmic-ray air-showers
located in Siberia, triggered by Tunka-133, a co-located air-Cherenkov detector
during night, and by a scintillator array Tunka-Grande during day. Tunka-Rex
demonstrates that the radio technique can provide a cost-effective extension of
existing air-shower arrays. Operating in the frequency range of 30-80 MHz,
Tunka-Rex is limited by the galactic background, and suffers from the local
radio interferences. We investigate the possibilities of the improving of
measured data using different approaches, particularly, the multivariate
background suppression is considered, as well as improved likelihood fit of the
lateral distribution of amplitudes.

Instrumentation and Methods for Astrophysics;High Energy Astrophysical Phenomena