同時傳輸基頻資料以及微波訊號的光纖鏈結之研究

Abstract

現在不管是有線或無線傳輸的頻寬需求量都在不停的增加，對於無線訊號的存取,加載光纖射頻系統是一個極富彈性的傳輸方式，所以為了低價的通訊建設，將固定的有線網路與加載光纖射頻系統結合在一起是一個迫切的需求。於是，在本論文中，我們提出幾種可以同時傳輸基頻以及微波訊號的光纖鏈結。其中，有兩種可以將60GHz頻帶中的射頻訊號加在由頻移鍵控和差分相移鍵控調變的10Gbps基頻訊號上的架構是利用VPI這套軟體來進行模擬分析，並且，靠著實驗以及模擬的結果分析,我們比較從光域和電域來結合20GHz頻帶的射頻訊號和2.488Gbps基頻資料兩者之間的差異。希望我們提出的幾種架構可以有益於光纖通訊系統的研究。

The demand on both wired and wireless access network is accelerating. For wireless access, one feasible option is radio over fiber (Rof). There is an emerging need to merge the fixed wired network and the RoF network for low cost infrastructure. So, in this thesis, several fiber-optic links that support simultaneous transmission of baseband data and radio signals are presented. By using simulation tool, VPI, we demonstrate two novel modulation methods which load 60-GHz-band radio signals on the frequency shift keying (FSK) and differential phase shift keying (DPSK) modulated 10Gbps baseband data, respectively. Moreover, two schemes which combine 20-GHz-band radio signals and 2.488Gbps baseband data in electrical and optical domain are compared through simulation and experimental results. These architectures are expected to be useful in the fields of fiber communication systems.