Elamassie, MohammedKarbalayghareh, MehdiMiramirkhani, FarshadUysal, Murat2019-09-182019-09-182019-04978-172811904-52165-0608http://hdl.handle.net/10679/6264https://doi.org/10.1109/SIU.2019.8806323Visible light communication (VLC) has been introduced as a complementary technology to acoustic communications for underwater applications. Underwater VLC can achieve much higher data rates sufficiently high for real-time image and video transmission. Such high data rates over underwater channels with frequency-selectivity necessitate the use of efficient multi-carrier techniques such as orthogonal frequency division multiplexing. In this paper, we consider an adaptive DC-biased optical OFDM (DCO-OFDM) underwater VLC system. The design of adaptive algorithm is formulated to maximize the throughput under error rate performance constraints. The receiver first calculates the signal-to-noise ratio (SNR) per each subcarrier. Then, based on SNR information, it determines which subcarrier should be loaded first and selects the maximum constellation size for each subcarrier while satisfying a predefined targeted bit error rate (BER). Our simulation results demonstrated that significant improvements in throughput can be obtained through link adaptation.enginfo:eu-repo/semantics/restrictedAccessConference paper00051899430005310.1109/SIU.2019.8806323Underwater visible light communicationOrthogonal frequency division multiplexingLink adaptation algorithmBit loading2-s2.0-85071993014