Precoding Based Channel Prediction for Underwater Acoustic OFDM |
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| Authors: | CHENG En LIN N SUN Hai-xin YAN Jia-quan and QI Jie |
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| Institution: | School of Information Science and Engineering, Xiamen University, Xiamen 361005, China;Key Laboratory of Underwater Acoustic Communication and Marine Information Technology(Xiamen University), Ministry of Education, Xiamen 361005, China;Science and Technology on Underwater Acoustic Antagonizing Laboratory, Beijing 100094, China,School of Information Science and Engineering, Xiamen University, Xiamen 361005, China;Key Laboratory of Underwater Acoustic Communication and Marine Information Technology(Xiamen University), Ministry of Education, Xiamen 361005, China;Science and Technology on Underwater Acoustic Antagonizing Laboratory, Beijing 100094, China,School of Information Science and Engineering, Xiamen University, Xiamen 361005, China;Key Laboratory of Underwater Acoustic Communication and Marine Information Technology(Xiamen University), Ministry of Education, Xiamen 361005, China;Science and Technology on Underwater Acoustic Antagonizing Laboratory, Beijing 100094, China,School of Information Science and Engineering, Xiamen University, Xiamen 361005, China;Key Laboratory of Underwater Acoustic Communication and Marine Information Technology(Xiamen University), Ministry of Education, Xiamen 361005, China;Science and Technology on Underwater Acoustic Antagonizing Laboratory, Beijing 100094, China and School of Information Science and Engineering, Xiamen University, Xiamen 361005, China;Science and Technology on Underwater Acoustic Antagonizing Laboratory, Beijing 100094, China |
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| Abstract: | The life duration of underwater cooperative network has been the hot topic in recent years. And the problem of node energy consuming is the key technology to maintain the energy balance among all nodes. To ensure energy efficiency of some special nodes and obtain a longer lifetime of the underwater cooperative network, this paper focuses on adopting precoding strategy to preprocess the signal at the transmitter and simplify the receiver structure. Meanwhile, it takes into account the presence of Doppler shifts and long feedback transmission delay in an underwater acoustic communication system. Precoding technique is applied based on channel prediction to realize energy saving and improve system performance. Different precoding methods are compared. Simulated results and experimental results show that the proposed scheme has a better performance, and it can provide a simple receiver and realize energy saving for some special nodes in a cooperative communication. |
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| Keywords: | underwater acoustic communication precoding channel prediction CFO OFDM |
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