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Modeling and estimation for doppler-shifted random processes.
| Content Provider | CiteSeerX |
|---|---|
| Author | Couvreur, Christophe Bresler, Yoram |
| Abstract | Signals emitted by moving sources and received at a fixed sensor are subject to the Doppler effect. For narrow-band signals the Doppler effect amounts simply to a frequency shift. The effect is more complex when the signals are wide-band. In this paper, a mathematical model for Doppler-shifted wide-band signal is introduced. The model assumes that the wide-band moving source can be represented by a stationary rational (ARMA) process. Several applications of the model are then described. First, a method for the generation of synthetic wide-band Doppler shifted signals is proposed. Next, a computationally efficient algorithm for the estimation of the motion of a stationary wide-band source with unknown spectrum from the recording at a single fixed sensor is derived. The performance of the algorithms is illustrated on synthetic and real acoustic data. Finally, an algorithm for the estimation of the power spectrum of signals subject to unknown Doppler shifts is proposed and its effectivene... |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Doppler-shifted Random Process Power Spectrum Frequency Shift Doppler Effect Amount Several Application Stationary Rational Synthetic Wide-band Doppler Unknown Doppler Shift Doppler-shifted Wide-band Signal Doppler Effect Mathematical Model Unknown Spectrum Efficient Algorithm Stationary Wide-band Source Fixed Sensor Real Acoustic Data Narrow-band Signal |
| Content Type | Text |
