[LR] Binocular Vision SSVEP BCI for Dual-Frequency Modulation
[This review is intended solely for my personal learning] Paper Info DOI: 10.1109/TBME.2022.3212192 Title: A Binocular Vision SSVEP Brain–Computer Interface Paradigm for Dual-Frequency Modulation Authors: Yike Sun, Liyan Liang, Jingnan Sun, Xiaogang Chen, Runfa Tian, Yuanfang Chen, Lijian Zhang, and Xiaorong Gao Prior Knowledge SSVEP and BCIs: Steady-State Visual Evoked Potentials (SSVEPs) are brain responses elicited by periodic visual stimuli. Their robustness and high signal-to-noise ratio make them a cornerstone in non-invasive BCI research Dual-Frequency Stimulation: Traditional dual-frequency paradigms, such as the checkerboard arrangement, allow the encoding of more targets but are hampered by intermodulation artifacts, which can compromise signal quality. Binocular Vision Approach: By using circularly polarized light to deliver different frequencies to each eye, the binocular vision paradigm minimizes interference from intermodulation harmonics, thereby enhancing signal fidelity. Goal To design and evaluate a novel dual-frequency SSVEP paradigm based on binocular vision that suppresses intermodulation harmonics and enhances overall BCI performance, particularly in training-free applications. ...