Table 3. Summary of CCA-based SSVEP Detection Methods.

Methods	Calibration data	Reference signals	Dimension of reference signals	Feature extraction	References
CCA	Not required	Sinusoidal signals	2N h × N s	Canonical correlation	[15]
CACC	Required	Sinusoidal signals	2N h × N s	Canonical correlation; Nearest neighbor	[26]
PCCA	Required	Sinusoidal signals	N h × N s	Canonical correlation	[29]
MwayCCA	Required	Sinusoidal signals; SSVEP reference signal	2N h × N s; 1 × N s	Multiple linear regression	[31]
L1-MCCA	Required	Sinusoidal signals; SSVEP reference signal	2N h × N s; 1 × N s	Canonical correlation	[32]
MsetCCA	Required	SSVEP reference signals	N t × N s	Canonical correlation	[33]
IT-CCA	Required	Averaged SSVEP templates	N c × N s	Canonical correlation	[30]
Combination Method	Required	Sinusoidal signals; Averaged SSVEP templates	2N h × N s; N c × N s	Canonical correlation; correlation coefficient	[5]