目的:利用计算机仿真人体脑电背景信号和人视觉诱发电位信号,验证基于自参考、自相关、自适应干扰对消理论(AAA-ICM)的诱发电位单次提取新方法。材料与方法:用Delphi语言编程仿真脑电背景信号与视觉闪光诱发电位信号,实现AAA—ICM算法提取诱发电位信号,用信号的功率值及相关系数衡量提取效果。结果:仿真结果表明使用该方法,可以从带有强的自发脑电干扰信号中单次提取出诱发电位信号。结论:与传统的叠加平均提取方法相比,简化了提取方法。改善了提取质量。
Objective: A new single trial estimation of evoked potential, which based on auto-reference, auto-correlation, auto-adaptive interference cancellation method (AAA-ICM),was proved in this paper by the computer simulation of electroencephalo-signal and flash visual evoked potential (FVEP). Material and Method: The electroencephalo-signal and FVEP were simulated by Delphi program, And the program of extracting VEP by AAA-ICM algorithm was implemented. The extraction effect was measured by the power value and correlation value. Results: The stimulation results showed that evoked potential could be extracted from strong background brain activity, Conclusion: Contrast to the traditional superposition averaging method, it can simplify extraction method and improve quality of EP.