Lasers, Fiber Optics, and Communications

Performance improvement by orthogonal pulse amplitude modulation and discrete multitone modulation signals in hybrid fiber-visible laser light communication system

[+] Author Affiliations
Fangliu Zhang, Jing He, Rui Deng, Qinghui Chen, Lin Chen

Hunan University, Key Laboratory for Micro-/Nano-Optoelectronic, Devices of Ministry of Education, College of Computer Science and Electronic Engineering, Changsha 410082, China

Opt. Eng. 55(10), 106106 (Oct 11, 2016). doi:10.1117/1.OE.55.10.106106
History: Received July 8, 2016; Accepted September 26, 2016
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Abstract.  A modulation format, orthogonal pulse amplitude modulation and discrete multitone modulation (O-PAM-DMT), is experimentally demonstrated in a hybrid fiber-visible laser light communication (fiber-VLLC) system using a cost-effective directly modulated laser and blue laser diode. In addition, low overhead is achieved by utilizing only one training sequence to implement synchronization and channel estimation. Through adjusting the ratio of PAM and DMT signal, three types of O-PAM-DMT signals are investigated. After transmission over a 20-km standard single-mode fiber and 5-m free-space VLLC, the receiver sensitivity for 4.36-Gbit/s O-PAM-DMT signals can be improved by 0.4, 1.4, and 2.7 dB, respectively, at a bit error rate of 1×103, compared with a conventional DMT signal.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Fangliu Zhang ; Jing He ; Rui Deng ; Qinghui Chen and Lin Chen
"Performance improvement by orthogonal pulse amplitude modulation and discrete multitone modulation signals in hybrid fiber-visible laser light communication system", Opt. Eng. 55(10), 106106 (Oct 11, 2016). ; http://dx.doi.org/10.1117/1.OE.55.10.106106


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