Study On Modulation Recognition Method Of Communication Signals Based On Rough Set

The research work in this paper not only presents a new thought and method for the communication signals modulation recognition of a wide band dynamic digital receiver. Also, the research has high practical significance, but also attempts to the application of Rough Set which has a application in the communication signals modulation recognition.In this paper, the application of Rough Set in the communication signals modulation recognition is researched, based on the learning about the domestic and overseas present and the extensive collection of prevenient research data. Some relation and basic knowledge of communication signals modulation is introduced firstly. In addition, This paper introduces definition of high-order cumulants and the algorithm of all feature variables, after that, takes Rough Set intensive theory description, and applies Rough Set to election of feature variables and uses Back-Propagation Network as classification instruments because of shortcoming of Rough Set and advantage of Back-Propagation Network. and some experiment results of 2psk, 2fsk, 2ask, 4psk and 4ask, which are collected factually, prove that the method has better recognition effect compared with other methods. At last, the next research work is previewed.