In this short paper, we look at a real-world implementation of an algorithm to enhance localization of a moving object in an underwater distributed antenna system. We utilize OFDM modems which are capable of estimatin...
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Multiuser communication has been an important research area of underwater acoustic communications and networking. This paper studies the use of adaptive OFDMA in a multiuser downlink scenario, where a central node sen...
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ISBN:
(纸本)9781479949175
Multiuser communication has been an important research area of underwater acoustic communications and networking. This paper studies the use of adaptive OFDMA in a multiuser downlink scenario, where a central node sends data to multiple distributed nodes simultaneously. The reduction of channel feedback via clustering and quantization is considered, and an interleaved power-bit loading algorithm is presented to jointly assign the data subcarriers to different users and allocate the power and bits on each subcarrier. Simulation results show the performance improvement due to subcarrier allocation with and without additional power and bit loading. An experiment conducted in a swimming pool illustrates potential benefits and challenges of harvesting the multiuser diversity through adaptive subcarrier allocation.
Presents corrections to acknowledgements from the paper, “OFDM-Modulated Dynamic Coded Cooperation in Underwater Acoustic Channels” [Y. Chen, et al, IEEE J. Ocean. Eng., vol. 40, no. 1, pp. 159–168, Jan. 2015).
Presents corrections to acknowledgements from the paper, “OFDM-Modulated Dynamic Coded Cooperation in Underwater Acoustic Channels” [Y. Chen, et al, IEEE J. Ocean. Eng., vol. 40, no. 1, pp. 159–168, Jan. 2015).
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