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Demonstration of a 2.34 Gbit/s Real-Time Single Silicon-Substrate Blue LED based Underwater VLC System
IEEE Photonics Journal ( IF 2.4 ) Pub Date : 2020-02-01 , DOI: 10.1109/jphot.2019.2958969
Ming Chen , Peng Zou , Long Zhang , Nan Chi

We develop a real-time discrete multi-tone (DMT) transceiver based on field programmable gate array (FPGA) chips for a single chip silicon-substrate light-emitting diode (LED) based underwater visible light communication (UVLC). On-chip resource usages are analyzed and discussed. To improve bit error rate (BER) performance, a novel channel estimation technique utilizing hybrid inter-symbol frequency-averaging (Inter-SFA) and intra-symbol frequency-averaging (Intra-SFA) is proposed and investigated. The real-time DMT transceiver is experimentally verified in a silicon substrate blue LED-based UVLC system with a 1.2 m underwater link. By using the enhanced channel estimation, a gross bit rate of 2.34 Gbit/s real-time DMT signal over 1.2 m underwater transmission can be achieved with the BER of 3.5 × 10−3. What's more, multiple-symbol interleaved Reed-Solomon (RS) codes are employed to further improve BER performance. The real-time measured post-FEC BER of the DMT-UVLC with multiple-symbol interleaved RS (255, 191) codes can be improved by more than six orders of magnitude. As a result, error-free (less than 1 × 10−9) transmission is observed in our real-time experiment. Furthermore, 1.485 Gbit/s 720p high-definition video underwater transmission is successfully demonstrated. To the best of our knowledge, it is the first time to demonstrate a real-time LED-based UVLC system with DMT modulation beyond Gbit/s.

中文翻译:

基于 2.34 Gbit/s 实时单硅基板蓝色 LED 的水下 VLC 系统的演示

我们开发了一种基于现场可编程门阵列 (FPGA) 芯片的实时离散多音 (DMT) 收发器,用于基于单芯片硅衬底发光二极管 (LED) 的水下可见光通信 (UVLC)。分析和讨论了片上资源的使用。为了提高误码率 (BER) 性能,提出并研究了一种利用混合符号间频率平均 (Inter-SFA) 和符号内频率平均 (Intra-SFA) 的新型信道估计技术。实时 DMT 收发器在具有 1.2 m 水下链路的基于硅基板蓝色 LED 的 UVLC 系统中进行了实验验证。通过使用增强的信道估计,可以在 3.5 × 10−3 的 BER 下实现超过 1.2 m 水下传输的 2.34 Gbit/s 实时 DMT 信号的总比特率。更重要的是,多符号交错 Reed-Solomon (RS) 码用于进一步提高 BER 性能。具有多符号交织 RS(255、191)码的 DMT-UVLC 的实时测量后 FEC BER 可提高六个数量级以上。因此,在我们的实时实验中观察到无差错(小于 1 × 10−9)传输。此外,还成功演示了1.485 Gbit/s 720p高清视频水下传输。据我们所知,这是第一次展示具有超过 Gbit/s 的 DMT 调制的基于实时 LED 的 UVLC 系统。在我们的实时实验中观察到无错误(小于 1 × 10−9)传输。此外,还成功演示了1.485 Gbit/s 720p高清视频水下传输。据我们所知,这是第一次展示具有超过 Gbit/s 的 DMT 调制的基于实时 LED 的 UVLC 系统。在我们的实时实验中观察到无错误(小于 1 × 10−9)传输。此外,还成功演示了1.485 Gbit/s 720p高清视频水下传输。据我们所知,这是第一次展示具有超过 Gbit/s 的 DMT 调制的基于实时 LED 的 UVLC 系统。
更新日期:2020-02-01
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