Lu Ma
ABSTRACT
In view of the requirements for the applications of ocean development, environmental monitoring, disaster prevention etc., the HEU OFDM-modem for underwater acoustic communication and networking is presented in this paper. Orthogonal frequency division multiplexing (OFDM) technology is utilized in the physical layer, and protocols of ALOHA, MACAW are adopted in the data link layer. We conducted a mobile point-to-point communication experiment in May 2014, in the South Sea, China, where the bit error rate was less than 1.8x10-5, with bandwidth of 4 kHz, data rate of 3.03 kbps, and horizontal communication distance of 5 km. A small-scale underwater networking experiment was also carried out in the South Sea during the period from June 2nd to July 15th, 2014, where each node's depth and the water temperature around the node measured by TD (Temperature and Depth) profiling instruments were sent back to the gateway every 25 minutes through underwater acoustic channel.
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Index Terms
- HEU OFDM-modem for Underwater Acoustic Communication and Networking
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