Single-trial estimation of dynamic spectrum

• Published in: Guang pu xue yu guang pu fen xi Vol. 31; no. 7; p. 1857
• Main Authors: Li, Gang, Xiong, Chan, Wang, Hui-quan, Lin, Ling, Zhang, Bao-ju, Tong, Ying
• Format: Journal Article
• Language: Chinese
• Published: China 01.07.2011
• ISSN: 1000-0593
• DOI: 10.3964/j.issn.1000-0593(2011)07-1857-05

To improve the efficiency and accuracy of the dynamic spectrum data processing, the method of single-trial estimation was adopted. First, the rising edge of the whole band PPG was extracted, which was calculated by averaging superimposed collected photoelectric plethysmography (PPG) at all wavelengths as a template per single pulse; Second, this template was used to correct the rising edge of PPG at all wavelengths, and the difference of absorbance was calculate, and then a single-trial DS was obtained; finally, the single-trial DS which contained the gross error under the 3sigma criterion was removed, and then the remaining superimposed single-trial DS was averaged as the final output of the DS. Data measured from 10 volunteers were compared with the results of the extraction in frequency domain: the correlation coefficient distribution of the DS from the same finger of the same individual was improved from 0.006775 to 0.0003840; the correlation coefficient distribution of the DS from the different fingers o