Time-reversal-based underwater acoustic communication
| Autor: | Hee-Chun Song |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Equalization
Acoustics and Ultrasonics Computer science Equalization (audio) Glider Antenna diversity Intersymbol interference Arts and Humanities (miscellaneous) Pulse compression Robustness (computer science) Electronic engineering Multipath propagation Underwater acoustic communication Communication channel |
| Zdroj: | The Journal of the Acoustical Society of America. 134:4032-4032 |
| ISSN: | 0001-4966 |
| DOI: | 10.1121/1.4830724 |
| Popis: | Time reversal (TR) exploits spatial diversity to achieve spatial and temporal focusing in complex environments. Over the last decade its concept has been applied successfully to underwater acoustic communications in time-varying multipath environments with robustness and computational simplicity, as an alternative to conventional adaptive multichannel equalization. Temporal focusing (pulse compression) mitigates the intersymbol interference (ISI) and subsequent channel equalization removes the residual ISI, thus providing nearly optimal performance in theory. The spatial focusing capability facilitates multi-user communications without an explicit use of time, frequency, or code division, while an adaptive time reversal approach can further reduce the crosstalk among users. TR communications can be easily extended to time-varying channels using a block-based approach with periodic channel updates. This talk will present an overview of TR communications and recent advances including bidirectional equalization, single- versus multi-carrier approach, and communications with autonomous vehicles such as an AUV or Glider. |
| Databáze: | OpenAIRE |
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