- Forfatter
- Walree, Paul van
- Otnes, Roald Wilhelm
- Publisert
- 2013
- Emneord
- Undervannsakustikk
- Ultrabredbånd (UWB)
- Permalenke
- https://ffi-publikasjoner.archive.knowledgearc.net/handle/20.500.12242/32
- DOI
- 10.1109/JOE.2013.2253391
- Samling
- Articles
- Description
- Walree, Paul van; Otnes, Roald Wilhelm. Ultrawideband Underwater Acoustic Communication Channels. IEEE Journal of Oceanic Engineering 2013 ;Volum 38.(4) s. 678-688
-
- 1057117.pdf
- Size: 3M
- Sammendrag
- Traditional channel models for communications research are designed for narrowband systems. Underwater acoustic communication systems use a bandwidth that is not small compared with the center frequency of the signal and qualify as ultrawideband (UWB) in a relative sense. In this paper, measurements and analysis of acoustic propagation effects demonstrate the shortcomings of narrowband channel models. These effects are frequency-dependent fluctuation rates and frequency-dependent attenuation, where the frequency dependence of the attenuation differs between paths. This frequency selectivity of the medium violates the assumption of uncorrelated taps and requires a UWB channel model. It is also shown that correlative channel sounders preserve wideband properties, which renders them suitable for UWB channel simulation based on the principle of direct replay.