The Software defined radios(SDR)concept [1,2] suggests that future radio systems will support multi-standard,multimode and multiband wireless communications.As described in the survey [ 3 ],this technology also could be utilized in the vehicle to vehicle network,where existing multi-standards communication protocol currently.This agile radio system could be utilized through two main processors : Automatic Modulation Recognition(AMR)and Demodulation of digitally modulated communication signals.The AMR method can be described as blind identification of the modulation scheme used to format digital data embedded in a received signal.This technology is studied and developed in this work by utilizing a new feature-based method.