錯頻式載波技術應用於2×2多天線輸入多天線輸出V-Band光載微波訊號光纖之功率偵測器降頻系統

2×2 MIMO V-Band RoF System with Power Detector Down-Conversion Employing Frequency Offset Technology

陳文皇(Wen-Huang Chen)

指導教授 ： 林俊廷

國立交通大學/光電學院/光電系統研究所/碩士(2018年)

摘要

近幾年來隨著近代科技的快速發展，人們對於資訊傳輸要求大幅的提升(訊號品質、資料傳輸量及傳輸速度)，通訊系統為了因應龐大資料傳輸量面臨的問題而提出新的應用層與技術，其中目前最熱門的議題就是5G行動通訊發展，包括訊號接收處理複雜度、延遲問題以及提高訊號品質是必須解決的問題。
為了降低使用高頻頻段通訊所造成光載微波訊號光纖系統成本的增加，在本文提出使用功率偵測器取代混頻器與本地振盪器的降頻方式，並且使用訊號與訊號拍擊干擾補償演算法解決降頻後所產生的訊號與訊號拍擊干擾的影響。
由於要達到更高的資料傳輸速率，多天線輸入多天線輸出將被視為一項關鍵的應用，但是若要將此技術應用至功率偵測器降頻系統中將會形成射頻載波功率衰減的問題，進而導致接收的訊號品質會隨著使用者所在的位置而有所不同，因此本文提出錯頻式載波多天線輸入多天線輸出功率偵測器降頻系統以及相對應的訊號處理演算法來解決此問題，並且使用實驗驗證了使用本文所提出的系統架構以及演算法可以有效解決上述射頻載波功率衰減的問題。

關鍵字

毫米波 ； 光載微波光纖

並列摘要

As the development of modern technology, the requirement of the data rate and signal quality is up-growing. In order to deal with such data transmission, communication system needs to present novel application and technology. One of the most popular issue is 5G mobile communication. There are some problems to deal with, including the complexity of receiving signal, latency, and improving signal quality.
In the study, to reduce the cost of using high frequency signal bandwidth in radio-over fiber system, we propose to use envelop detector instead of mixer and local oscillator to down-convert signal, and use signal-to-signal beating interference(SSBI) compensation algorithm to resolve the effect generated by signal-to-signal beat interference.
Due to achieving higher data rate, multi-input multi-output(MIMO) is considered as the key application. However, if using MIMO to envelop detection system, it will cause the decay of RF carrier power, and then impact on receiving signal quality as the change of the position of users. Therefore, we propose frequency offset MIMO power detector down-conversion system and signal-processing algorithm accordingly to deal with the problems, and verify that the proposed architecture and algorithm can effectively resolve the problem of the decay of RF carrier power.

並列關鍵字

Millimeter wave ； Radio over fiber

參考文獻

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