Browsing by Author "Tseng, Ming-Chien"

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Demonstration of 1-Gbps real-time optical wireless communication by simple transmission scheme
(2020-06-02)
Yeh, Chien-Hung
;
Luo, Chien-Ming
;
Xie, Yue-Ru
;
Chow, Chi-Wai
;
Chen, Ruei-Bin
In the work, we propose and investigate a real-time optical wireless communication (OWC) system with 1 Gbps on-off keying (OOK) traffic rate for indoor and outdoor transmissions. Here, 1 Gbps OWC traffic with error-free operation can be achieved indoors under the free space transmission length of 500 m based on the simulation and experimental results. In addition, 952, 904, 476 Mbps throughput rates of proposed real-time OWC system are measured outdoors after passing through the wireless transmission lengths of 120, 300 and 500 m, respectively.
Hybrid free space optical communication system and passive optical network with high splitting ratio for broadcasting data traffic
(2018-11-01)
Yeh, Chien-Hung
;
Gu, Chong-Sin
;
Guo, Bo-Shen
;
Chang, Yao-Jen
;
Chow, Chi-Wai
In this paper, we propose and demonstrate a free space optical (FSO) communication system with 10 Gbit s(-1) on-off keying traffic, which is integrated in a passive optical network (PON) for broadcasting wireless data. After a transmission distance of 25 km of single-mode fiber and a free space transmission length of 6 m, the observed optical sensitivity of the FSO signal can reach -35.2 dBm within the forward error correction level at the bit error ratio of 3.8 x 10(-3) . Here, according to the obtained results of experiment and simulation, the FSO signal can support 2048 remote optical wireless units (OWUs) for wireless access via the PON network in free space transmission lengths of 0 to 160 m. Moreover, the proposed FSO-PON system also can support 1024, 512 and 256 remote OWUs in free space transmission lengths of 250, 350 and 500 m, respectively.