Design of Threshold in TDCS Signal Detection based on Time-Domain Correlation
Wenda Hou, Tianhui Fu, Yixin Zhu, Longfei Wang, Menglei Xiu · 2022 IEEE 10th Joint International Information Technology and Artificial Intelligence Conference (ITAIC) · 2022
In TDCS signal detection, the time-domain correlation function will have a spectral peak at the half multiple of the basis function. It is necessary to set an appropriate threshold for locking the position of the spectral peak. This paper analyzes the influence of basis function period, sampling points and signal-to-noise ratio on threshold design. Through in-depth research and analysis of a large number of simulation experimental results, the empirical formula of threshold design is given. The simulation results show that the empirical formula of the threshold design still accurately screens the spectral peaks under the condition of low signal-to-noise ratio.