Transmit Antenna and Relay Selections for Underwater MIMO-OFDM Cooperative Wireless Networks
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The multiple-input-multiple-output (MIMO), the orthogonal frequency division multiplexing (OFDM), and the cooperative communication techniques are widely applied in and significantly improved the essential performances of underwater acoustic (UWA) wireless networks in recent years. However, the challenge of reducing the computational complexity while guaranteeing performances of MIMO-OFDM based UWA wireless networks still remains to be resolved. In this paper, we propose a scheme for transmit antenna selection and relay selection to address this problem as follows. Using the channel station information feedback in the MIMO-OFDM based UWA cooperative communication channel, a single transmit antenna for each underwater sensor and one relay node which can maximize the total channel coefficient are selected to transmit data to the corresponding surface destination station, providing a balanced tradeoff between complexity and performance of the network.
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Proceedings of the 10th International Conference on Underwater Networks & Systems - WUWNET '15
