4Dobre O A, Abdi A, and Bax-Ness Y, et al. Survey of automatic modulation classification techniques: classical approaches and new trends. IET Commun., 2007, 1(2): 137-156.
5Kam-Tim W and Chi-Wah K. Clustering based distribution fitting algorithm for Automatic Modulation Recognition. IEEE Symposium on Computers and Communications, Aveiro, Portugal, 2007: 13-18.
6Liu L K and Xu J D. A novel Modulation classification method based on high order cumulants. International Conference on Wireless Communications, Networking and Mobile Computing, Wuhan, China, 2006: 1-5.
7Liu Y and Zhang Z P. High order QAM signals recognition based on layered modulation. International Conference on Communications, Circuits and Systems, Milpitas, USA, 2009: 73-76.
8Shi Q H, Gong Y, and Guan Y L. Asynchronous classification of high-order QAMs. IEEE Wireless Communications and Networking Conference, Las Vegas, USA, 2008:1188-1193.
9Xu Z N and Bai W L. A novel blind recognition algorithm for modulated M-QAM signals. International conference on communications and mobile computing, Kunming, China, 2009:461-465.
