Time delay estimation in reverberant and low SNR environment by EMD based maximum likelihood method
| Autor: | Amiya R Mohanty, B. Marxim Rahula Bharathi |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Reverberation
Audio signal Computer science Applied Mathematics Acoustics Noise reduction 020208 electrical & electronic engineering 010401 analytical chemistry 02 engineering and technology Condensed Matter Physics 01 natural sciences Signal Sonar Hilbert–Huang transform 0104 chemical sciences law.invention Noise Computer Science::Sound law 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Radar Instrumentation |
| Zdroj: | Measurement. 137:655-663 |
| ISSN: | 0263-2241 |
| DOI: | 10.1016/j.measurement.2019.01.096 |
| Popis: | In recent times, time delay estimation (TDE) has received significant practical importance in sonar, radar, GPS, and various other fields. In a passive sonar system, estimation of time delay for low frequency and low signal to noise (SNR) acoustic source is a difficult task. If the source and receivers are kept inside the reverberation environment, time delay estimation becomes more difficult because of sound source echo’s. This research work proposes a new TDE approach named empirical mode decomposition maximum likelihood time delay estimation (EMD ML TDE) method, for the low-frequency and low SNR underwater machinery acoustic signal in a reverberant environment. EMD ML TDE method is based on maximum likelihood (ML) method, and it is using empirical mode decomposition (EMD) denoising technique to estimate acoustic sound signal and noise from the noisy reverberant signal. The experimental results are provided that this new approach is better to estimate time delay in reverberant environments. |
| Databáze: | OpenAIRE |
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