Time-frequency analysis of Doppler sinusoidal shift signal with new figure eight kernel

In order to apply the Cohen's class Time-Frequency (TF) analysis using a novel kernel to the blood flow signal analysis, we investigated a higher resolution kernel for the ultrasound Doppler sinusoidal shift signal. We used three kinds of kernel, the Wigner distribution, the Choi-Williams distribution (CWD), and our new figure eight kernel (FED). The results show that the demodulation accuracy with FED is higher and the negative components are smaller than the CWD.