Abstract
In order to strengthen its anti-noise performance when using cepstrum to estimate the multipath time-delay of narrowband signals, a pre-processing method by adaptive Notch filtering and envelop modification is proposed based on the adaptive filtering. This method improves the signal-to-noise ratio (SNR) by adaptive Notch filtering, modifies its envelope and preserves the time-delay information. Simulation results show that this method can improve the SNR effectively and do not destroy the delay component. The channel information can be extracted effectively in combination with the cepstrum method.
| Original language | English |
|---|---|
| Pages (from-to) | 147-153 |
| Number of pages | 7 |
| Journal | Nanjing Li Gong Daxue Xuebao/Journal of Nanjing University of Science and Technology |
| Volume | 38 |
| Issue number | 1 |
| State | Published - 2014 |
| Externally published | Yes |
Keywords
- Adaptive Notch filtering
- Cepstrum
- Channel estimation
- Delay estimation
- Envelop modification
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