Hi Jinqi,
To achieve a more accurate signal delay for known signal forms like FMCW, you can use a direct analytical approach rather than Fractional Delay FIR Filters. Below is an overview of how to implement this :
Analytical Signal Delay Implementation
Define Constants and Parameters:
- Speed of light
- Sampling frequency
- Sweep time
- Sweep slope
- Phase offset
Calculate Delay:
- Compute the time delay based on the distance.
- Determine the number of zero-padded samples.
Generate Time Vector:
- Create a time vector for the signal.
Generate Signals:
- Generate the transmitted FMCW signal.
- Generate the delayed FMCW signal analytically by adjusting the time vector.
Apply Zero-Padding:
- Apply zero-padding to simulate the delay.
Plot Signals:
- Plot the original and delayed signals for visual comparison.
This approach directly adjusts the time vector to account for the delay, providing a more accurate representation of the delayed signal for known signal forms like FMCW.
