Unary-Coded Dimming Control Improves ON-OFF Keying Visible Light Communication
Unary-Coded Dimming Control Improves ON-OFF Keying Visible Light Communication
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DOI：
10.1109/tcomm.2017.2759271
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发表时间：
2018-01-01
影响因子：
8.3
通讯作者：
Hanzo, Lajos
中科院分区：
文献类型：
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作者：
Babar, Zunaira;Izhar, Mohd Azri Mohd;Hanzo, Lajos
理想的可见光通信（VLC）系统应该在高吞吐量下提供可靠的数据传输，同时在用户定义的调光级别上提供无闪烁的照明。本着这种精神，我们设想了一种用于开关键控（OOK）调制VLC系统的一元码辅助调光方案。提出的一元编码方案在依赖于迭代解码的同时，有利于联合调光和吞吐量控制。结果表明，所提出的一元编码调光方案比同时代的方案提供了有吸引力的吞吐量增益，并且它也能够接近理论吞吐量限制。此外，我们设计了新颖的联合调光前向纠错编码方案，该方案在可实现的误码率性能和吞吐量方面显著优于基于补偿时间调光的编码方案。最后，在寻求接近容量的过程中，我们还使用外在信息传输图优化了我们的系统，并演示了在基于补偿时间调光的经典基准测试中，信噪比增益高达6 dB。
An ideal visible light communication (VLC) system should facilitate reliable data transmission at high throughputs, while also providing flicker-free illumination at the user-defined dimming level. In this spirit, we conceive a unary code aided dimming scheme for ON-OFF keying (OOK) modulated VLC systems. The proposed unary-coded scheme facilitates joint dimming and throughput control, while relying on iterative decoding. It is demonstrated that the proposed unary-coded dimming scheme provides attractive throughput gains over its contemporaries and it is also capable of approaching the theoretical throughput limit. Furthermore, we design novel joint dimming-forward error correction coding schemes, which significantly outperform their compensation time dimming-based counterparts in terms of the attainable bit error rate performance as well as the throughput. Finally, in the quest for approaching the capacity, we also optimize our system using EXTRINSIC information transfer charts and demonstrate an SNR-gain of upto 6 dB over the compensation time dimming-based classic benchmarker.