Modulation Recognition of MPSK Signals Based on Generalized Quartic Spectrum

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Tang, Shengwu^1^2 ; Zhao, Chunhui^2 ; Jiao, Heng^2 ; Qiao, Lu^1

China Electronics Technology Group Corporation NO.49th Research Institute, Harbin

150001, China^1

College of Information and Communication Engineering, Harbin Engineering University, Harbin

150001, China^2

关键词: Alpha-stable distribution;    Automatic modulation recognition;    Carrier frequency;    Characteristic exponents;    Feature parameters;    Modulation recognition;    New modulation;    Spectral line;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/3/032031/pdf
DOI  :  10.1088/1755-1315/252/3/032031

来源: IOP

【 摘 要 】

Automatic modulation recognition (AMR) has become an interesting problem in communication systems with various civil and military applications. The modulation recognition method based on quartic spectrum will degrade seriously in the Alpha-stable distribution noise. To solve this problem, ageneralized transform is proposed in this paper, based on which, a new modulation recognition method of MPSK is investigated. First, generalized quartic spectrums of signals are analyzed. Thenthe method extracts spectrum lines of two times carrier frequency and four times carrier frequency in generalized quartic spectrum as the feature parameters. Finally the method realizes the recognition of signals through judging whether spectrum lines are impact spectral lines or not. Experimental results show that the novel method has good performance in both Alpha-stable distribution noise and Gaussian noise, and it is less affected by characteristic exponent of noise ranging from 1 to 2.