SSVEP-Based Brain-Computer Interfaces Using FSK-Modulated Visual Stimuli
SSVEP-Based Brain-Computer Interfaces Using FSK-Modulated Visual Stimuli
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DOI：
10.1109/tbme.2013.2265260
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发表时间：
2013-10-01
影响因子：
4.6
通讯作者：
Morikawa, Naoki
中科院分区：
文献类型：
--
作者：
Kimura, Yosuke;Tanaka, Toshihisa;Morikawa, Naoki
基于稳态视觉诱发电位(SSVEP)的脑机接口(BCI)存在两个难点：指令数量受限和指令执行概率不均匀。为了解决这些问题，本文提出了一种基于调频视觉刺激的脑-机接口范式。这些命令被翻译成由二进制数组成的码字，并为其分配具有不同频率的视觉刺激。识别SSVEP的频率以检测比特，并根据检测的比特序列确定要执行的命令。实验结果表明，该方法具有较高的准确率和均衡的命令执行概率，实现了可靠的脑机接口。
A brain-computer interface (BCI) based on steady-state visual-evoked potentials (SSVEP) has two difficulties: limitation of the number of commands and uneven probabilities of command execution. To address these problems, the present paper proposes a paradigm of BCI using frequency-modulated visual stimuli. The commands are translated into code words consisting of binary digits, to which visual stimuli with distinct frequencies are assigned. Frequencies of SSVEP are recognized to detect bits, and a command to be executed is determined from the sequence of detected bits. Experimental results show that the proposed paradigm achieves a reliable BCI with higher accuracies and balanced command executing probabilities.