Automatic Modulation Recognition of Digital Communication Signals

For the use of multi-modulation,the precondition of receiving and demodulating signal is to decide the type of the modulation.So automatic recognition of modulation signal is a required function for software radio receiver.In this paper,eight types of digital modulations are recognized by using five effective key features and utilizing the decision-tree approach.The simulation results shows that overall success rate is over 99% at SNR≥ 10dB.This algorithm is proved in good performance.It has such features as simple structure,less calculation and good real-time performance,and can realize automatic modulation recognition.