| Autor: |
Conghui Cao, Hua Yang, Hao Zhang, Yan Wang, Thomas Aaron Gulliver |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Applied Sciences, Vol 8, Iss 12, p 2348 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
2076-3417 |
| DOI: |
10.3390/app8122348 |
| Popis: |
The passive detection of low-altitude signal sources is studied using an improved cross-correlation method in the time⁻frequency domain. A matching template is designed for signal cross-correlation, and a cross-correlation threshold is used to determine whether a signal source is present or not. An improved cross-correlation method is also proposed to estimate the direction of arrival and communication frequency of a signal source. Furthermore, the distance and signal-to-noise ratio are estimated using an energy detector. Outdoor data from a bridge in the Jimo District, Qingdao, and indoor data from a research laboratory are used for performance evaluation. The results obtained show that the proposed method can provide better passive detection of low-altitude signal sources compared to several well-known algorithms in the literature. In addition, this method is more suitable for long-distance detection. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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