| Summary: | 碩士 === 國立臺北科技大學 === 光電工程系 === 107 === In the development of high-speed Internet, 5G mobile network and telecommunications, etc., the serial traffic in the Internet also reaches the transmission volume of Gpbs. These factors lead to a large increase in transmission volume. In order to achieve the growth of bandwidth demand, in the future, wireless and wired network communication systems will be used to show each other's advantages, that is, the system implementation of fiber-free space wireless optical transmission. A dual-wavelength and orthogonal polarization is used to construct a timely wireless hybrid system and an invisible light system, and a timely four-level pulse amplitude modulation (PAM4) fiber-wireless hybrid system using parallel/orthogonal polarization and optical fiber invisible light communication is constructed. (IVLLC). In order to avoid MATLAB's complex offline calculations, the PAM4 bit error rate (BER) is measured in time. With PAM4 signal modulation, parallel/orthogonal polarization dual-wavelength scheme and fiber-IVLLC/fiber-wireless hybrid architecture, the total transmission capacity of the system is increased by eight times. Through in-depth study of this timely PAM4 fiber-IVLLC and fiber-optic wireless hybrid system, good performance of BER and eye diagram on 25km single-mode fiber transmission, 100m free space transmission/5-m RF wireless transmission was observed. This timely PAM4 fiber-IVLLC and fiber-optic wireless hybrid system is not only significant due to advances in fiber optic backhaul and optical/radio wireless expanders, but also because of its advantages in communication links. Provide higher transmission capacity.
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