陣列天線波束成形優化與系統特徵驗證技術發展

Array Antenna Beamforming Optimization and the Development of the Verification Technology in Systematic Feature

詹柏呈(Bo-Cheng Chan)

指導教授 ： 周錫增

國立臺灣大學/電機資訊學院/電信工程學研究所/碩士(2021年)

https://doi.org/10.6342/NTU202101377

摘要

無線通訊系統的目前應用主要範疇之一為5G行動通訊系統，而5G通訊系統為彌補頻段變高所帶來的消耗，不得不使用大型陣列，藉由提高單元的數目以及陣列的特性來達到較遠距離的傳輸，但大型陣列會產生出一個小型陣列不太會遇到的問題——掃描視盲現象。而本篇意旨為對於大型陣列系統常遇見的掃描視盲問題做出改正，給予一個能夠有效改善的方式，並建立出一個5G的天線陣列系統的架構並針對我們提出的方式作驗證。我們使用的方法主要是針對Active S-parameter去做調整，由天線陣列架構調整以及從饋入端建造演算法去做優化，而驗證的架構由低頻的base端開始，使用國家儀器(NI, National Instrument)的通用軟體無線電外設(USRP, Universal Software Radio Peripheral)去做建構，包含對於訊號的調變與解調，傳送端與接收端的識別碼處理，與放大器、6GHz以下的升降頻都由USRP做處理，後端接上的是由微型處理器(MCU, microcontroller unit)控制的升降頻與天線模組，傳輸的方式會以即時的影片傳輸為主。

關鍵字

掃描視盲 ； Active S 參數 ； 波束成形 ； 大型陣列天線 ； EBG結構

並列摘要

5G mobile communication system is one of the main integral parts of wireless communication system nowadays, and the consisting usage of large antenna arrays is the most imperative approach due to the power loss caused by operations at high frequencies. However, an inherit problem called scan blindness due to the application of large antenna array will come to the fore in contrast to the usage of small antenna array. The purpose of this dissertation is to provide an improvement manner to the scan blindness, a common problem of the large antenna array, and build up a framework of antenna array system in 5G bands. The main idea of our method is based on the proposed concept of Active S-parameter. We adjust the structure of the antenna array and the phases of the insertion separately. Our confirming system starts with USRP, a National Instrument production, in the baseband, which is responsible for signal modulation/demodulation, identification code processing for both TX/RX ports, amplification, and sub-6GHz up down converter processing. In the passband, we use microcontroller unit to control the up/down converter and RF transceiver module. And the data we transmit is the real-time video transmitting.

並列關鍵字

Scan blindness ； Active S-parameter ； Beamforming ； Large antenna array ； EBG structure

參考文獻

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