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http://dx.doi.org/10.3837/tiis.2021.02.015

Deep Learning-Based Modulation Detection for NOMA Systems  

Xie, Wenwu (School of Information Science and Engineering, Hunan Institute of Science and Technology)
Xiao, Jian (School of Information Science and Engineering, Hunan Institute of Science and Technology)
Yang, Jinxia (School of Information Science and Engineering, Hunan Institute of Science and Technology)
Wang, Ji (College of Physical Science and Technology, Central China Normal University)
Peng, Xin (School of Information Science and Engineering, Hunan Institute of Science and Technology)
Yu, Chao (School of Information Science and Engineering, Hunan Institute of Science and Technology)
Zhu, Peng (School of Information Science and Engineering, Hunan Institute of Science and Technology)
Publication Information
KSII Transactions on Internet and Information Systems (TIIS) / v.15, no.2, 2021 , pp. 658-672 More about this Journal
Abstract
Since the signal with strong power need be demodulated first for successive interference cancellation (SIC) receiver in non-orthogonal multiple access (NOMA) systems, the base station (BS) need inform the near user terminal (UT), which has allocated higher power, of the far UT's modulation mode. To avoid unnecessary signaling overhead of control channel, a blind detection algorithm of NOMA signal modulation mode is designed in this paper. Taking the joint constellation density diagrams of NOMA signal as the detection features, the deep residual network is built for classification, so as to detect the modulation mode of NOMA signal. In view of the fact that the joint constellation diagrams are easily polluted by high intensity noise and lose their real distribution pattern, the wavelet denoising method is adopted to improve the quality of constellations. The simulation results represent that the proposed algorithm can achieve satisfactory detection accuracy in NOMA systems. In addition, the factors affecting the recognition performance are also verified and analyzed.
Keywords
Modulation Detection; NOMA; Wavelet Denoising; Residual Network;
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