Propose a fixed-complexity sphere decoder and interference mitigation method for downlink MU-MIMO systems, achieving near-optimal performance and significant improvement in inter-user interference reduction.
Among the most difficult jobs is automatic emotion recognition. A powerful learning system that can express high-level abstraction is needed to extract emotion from nonstationary EEG signals. In order to find the unknown feature connection between input signals that is essential for the learning job, this study suggests using a deep learning network (DLN).Using a hierarchical feature learning approach, a stacked auto encoder (SAE) is used to create the DLN. The power spectral densities of 14-channel EEG recordings from 23 participants constitute the network's input properties. Principal component analysis (PCA) is used to identify the key components of the initial input features in order to reduce the overfitting issue. Moreover, the principal components' covariate shift adaptation is used to reduce the nonstationary influence of the EEG data. And also power spectral density is also calculated from EEG input data. According to experimental data, the DLF can accurately classify three different valence and arousal levels with 49.52% and 46.03%, respectively. Covariate shift adaption based on principal components improves the corresponding classification accuracy by 5.55% and 6.53%.
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