A Weighted Turbo Equalized Multi-Band Underwater Wireless Acoustic Communications
| Autor: | Ji-Won Jung, Chang-Uk Baek, Hui-Su Lee, Wan-Jin Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Computer science
Turbo Throughput 02 engineering and technology 01 natural sciences lcsh:Technology Radio spectrum lcsh:Chemistry underwater wireless acoustic communications 0202 electrical engineering electronic engineering information engineering Electronic engineering threshold Wireless General Materials Science Fading Instrumentation lcsh:QH301-705.5 0105 earth and related environmental sciences Fluid Flow and Transfer Processes biology 010505 oceanography business.industry lcsh:T turbo pi code Process Chemistry and Technology General Engineering 020206 networking & telecommunications Code rate biology.organism_classification lcsh:QC1-999 Computer Science Applications Transmission (telecommunications) lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 business lcsh:Engineering (General). Civil engineering (General) multi-band lcsh:Physics Communication channel |
| Zdroj: | Applied Sciences Volume 8 Issue 10 Applied Sciences, Vol 8, Iss 10, p 1711 (2018) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app8101711 |
| Popis: | The multi-band UWAS (Underwater Wireless Acoustic Sensor) communication techniques are effective in terms of performance and throughput efficiency because they can overcome selective frequency fading by allocating the same data to different frequency bands, in an environment of rapidly changing channel transfer characteristic. However, the multi-band configuration may have a performance worse than the single-band one because performance degradation in one particular band affects the output from all the other bands. This problem can be solved by using a receiving end that analyzes the error rates of each band, sets threshold values and allocates the lower weights to the inferior bands. There are many methods of setting threshold values. In this paper, we proposed an algorithm to set the threshold value by using the preamble error rates, which are known data that have to be transmitted and received. In addition, we have analyzed the efficiency of multi-band transmission scheme in the UWAS communication by applying 1~4 number of multi-bands, using turbo pi codes, with a coding rate of 1/3. We evaluated the performance of the proposed multi-bands transmission model in real underwater environments. Experimental results showed that the performance increased as the number of multiple bands increased. Furthermore, the performance of multi-band was improved when the proposed threshold algorithm was applied. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|