Lian-Kuan Chen, Yingjie Shao, Rui Deng, "Robust UOWC systems against bubble-induced impairments via transmit/receive diversities [Invited]," Chin. Opt. Lett. 17, 100006 (2019)
- Chinese Optics Letters
- Vol. 17, Issue 10, 100006 (2019)
Fig. 1. Illustration of the ocean bubbles, UOWC links, and underwater communication networks.
Fig. 2. Experimental setup and DSP block.
Fig. 3. (a) Experimental testbed. Images of bubbles captured in the experiment with an estimated average size of (b) large size:
Fig. 4. Performance of UOWC system without bubbles: (a) SNR versus subcarrier index with a bandwidth of 200 MHz, (b) BER versus data rate (different bandwidth used), (c) the distribution of packet BER for 200 packets with a signal bandwidth of 200 MHz.
Fig. 5. BER performance of 200 packets with (a)–(c) large-size bubbles, (d)–(f) medium-size bubbles, and (g)–(i) small-size bubbles, at a distance from TXs of P1: 10 cm, P2: 40 cm, and P3: 70 cm, respectively. The green dash lines correspond to the mean levels of different schemes.
Fig. 6. PDFs of the BER performance under scenarios with different bubble sizes: (a) large, (b) medium, and (c) small.
Fig. 7. Average BER of packets below SD-FEC. (The gray lines show the reference BER of each scheme without bubbles.)
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Table 1. BER Variance
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Table 2. Packet Loss Rate
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