Design Philosophy of MIMO OFDM system for Underwater Communication
| Autor: | Dong-Keol Han, KyungHi Chang, Bing Hui, Sea-Moon Kim, Yong-Kon Lim, Sung-Hun Byun |
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| Rok vydání: | 2011 |
| Předmět: |
Block code
business.industry Computer science Orthogonal frequency-division multiplexing MIMO Data_CODINGANDINFORMATIONTHEORY MIMO-OFDM Space–time block code Channel state information Electronic engineering Maximal-ratio combining Telecommunications business Underwater acoustic communication Computer Science::Information Theory Communication channel |
| Zdroj: | The Journal of the Korean Institute of Information and Communication Engineering. 15:22-32 |
| ISSN: | 2234-4772 |
| DOI: | 10.6109/jkiice.2011.15.1.022 |
| Popis: | In this paper, we first analyze the differences of underwater acoustic (UWA) orthogonal frequency division multiplexing (OFDM) systems and conventional terrestrial OFDM system, and give a simple introduction of the backgrounds. By considering the real UWA channel environments, the measured channel data is used to generate the UWA channel model and calculate the relative parameters for underwater OFDM systems. Practical least square (LS) based channel estimation with linear interpolation are adopted to obtain the channel state information (CSI) at receiver side. As multi-input multi-output (MIMO) processing techniques, Alamouti code is implemented and evaluated to perform for space time block coding (STBC) and space frequency block coding (SFBC) for UWA OFDM systems with the MIMO configuration of , at the same time, maximum ratio combining (MRC) is performed for the purpose of comparison. The simulation results show that, with perfect channel estimation, SFBC failed to work duo to the serious frequency selectivity of UWA channel environments. When the practical channel estimation is applied, in the case of STBC, the proposed 4-column pilot pattern gives better performance about 7dB than SISO system. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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