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Target velocity estimation with FM and PW echo ranging Doppler systems. II. Systems analysis
1Worcester Polytech. Inst., MA.
Summary
This study presents two FM Doppler system implementations for velocity profiling. One uses phase shift measurement, analogous to pulsed wave (PW) Doppler, while the other employs time shift measurements for frequency-domain analysis.
Area of Science:
- Medical Imaging
- Signal Processing
- Biomedical Engineering
Background:
- Part I discussed encoding velocity and range information using coherent repetitive linear sweep signals.
- Conventional pulsed wave (PW) Doppler systems are widely used for velocity measurements.
Purpose of the Study:
- To present two distinct implementations of Frequency Modulated (FM) Doppler systems for obtaining velocity profiles.
- To offer alternatives to conventional pulsed wave (PW) Doppler systems.
Main Methods:
- Developed a correlation-based system measuring phase shift, similar to conventional PW Doppler.
- Developed a cross-correlation-based system measuring time shift, serving as a frequency-domain analog to PW Doppler.
Main Results:
- Demonstrated two viable FM Doppler system implementations for velocity profile acquisition.
- The presented systems offer different approaches to Doppler signal processing for velocity estimation.
Conclusions:
- The two FM Doppler system implementations provide versatile methods for velocity profiling.
- These systems expand the toolkit for non-invasive velocity measurements in various applications.
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