摘要
伪随机序列技术是通过加大刺激密度而提高检测信噪比、加快检测速度的一项诱发电位检测技术，具有潜在应用前景。然而当序列较长时，这项技术的计算量剧增，使实时检测成为困难。本文结合ｍ序列及Ｗａｌｓｈ函数的性质，推导出Ｍ矩阵与Ｗ矩阵的等价关系，并利用快速Ｗａｌｓｈ变换来实现ｍ序列的解卷积。求解诱发电位的运算量由原来的Ｌ２数量级减少到Ｌｌｏｇ２Ｌ数量级，使诱发电位实时快速检测成为可能。
Pseudo-random sequence technique can be applied to speed up evoked potential measurement by means of shortening the stimulating intervals.It can improve signal-to-noise ratio,and hence has potential applications.However,increasing the length of sequences will result in a sharp increase in computation.Therefore,it is difficult to apply this technique to real time measurement.In this paper,an algorithm is presented for fast compute of this technique.It is shown that an M matrix based on an m-sequence is equiv...
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
1996年第10期4-9,共6页
Journal of South China University of Technology(Natural Science Edition)
基金
广东省自然科学基金
