Spectral analysis versus counting
Abstract
Spectrum analysis and counting for determining the Doppler frequency of single bursts are investigated. Optimum schemes are synthesized on the basis of Maximum Likelihood Estimation. The concept of robust estimation is introduced. The counter is shown to be a robust processor in cases of high S/N and single burst detection. However, the noise bandwidth of the counter is generally much larger than that of the spectrum analyzer. The effect of the analyzer bandwidth is investigated in relation to different post detection algorithms. The analyzer bandwidth has a strong impact on the variance of the frequency estimate. General recommendations about the application of the processors are given.
- Publication:
-
2nd International Symposium on Laser Anemometry
- Pub Date:
- 1985
- Bibcode:
- 1985asme.symp..189L
- Keywords:
-
- Counters;
- Doppler Effect;
- Laser Doppler Velocimeters;
- Maximum Likelihood Estimates;
- Signal Processing;
- Spectrum Analysis;
- Bandpass Filters;
- Bandwidth;
- Optimal Control;
- Robustness (Mathematics);
- Signal To Noise Ratios;
- Instrumentation and Photography