Study of Blind Demodulation Algorithm based on Sequential Detection of Unknown Constellation QAM
Chao Li, Guo Lili, Zheng Dou, Yun Lin · International Journal of Signal Processing Image Processing and Pattern Recognition · 2013
In this paper, we propose a novel on-line blind demodulation algorithm for Quadrature Amplitude Modulation (QAM). The proposed approach can demodulate QAM signal without constellation knowledge, and reach the theoretical optimal performance under the constraint of sequential detection. Numerical simulations are provided to validate the analytical results. Results show that when iterations are large enough, the bit error rate (BER) of the proposed approach can be close to the optimal demodulation algorithm.