Design of a low-cost acoustic modem for moored oceanographic applications
WUWNet '06 Proceedings of the 1st ACM international workshop on Underwater networks
Low-power acoustic modem for dense underwater sensor networks
WUWNet '06 Proceedings of the 1st ACM international workshop on Underwater networks
Reconfigurable acoustic modem for underwater sensor networks
WUWNet '06 Proceedings of the 1st ACM international workshop on Underwater networks
An OFDMA-based MAC protocol for under water acoustic wireless sensor networks
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
The softwater modem: a software modem for underwater acoustic communication: short paper
Proceedings of the Fourth ACM International Workshop on UnderWater Networks
VHDL modules and circuits for underwater optical wireless communication systems
WSEAS TRANSACTIONS on COMMUNICATIONS
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The success of multicarrier modulation in the form of OFDM in radio channels illuminates a path one could take towards high-rate underwater acoustic communications, and recently there are intensive investigations on underwater OFDM. In this paper, we implement the acoustic OFDM transmitter and receiver design of [4,5] on a TMS320C6713 DSP board. We analyze the workload and identify the most time-consuming operations. Based on the workload analysis, we tune the algorithms and optimize the code to substantially reduce the synchronization time to 0.2 seconds and the processing time of one OFDM block to 1.7 seconds on a DSP processor at 225 MHz. This experimentation provides guidelines on our future work to reduce the per-block processing time to be less than the block duration of 0.23 seconds for real time operations.