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系統識別號 U0026-3008201610565100
論文名稱(中文) 以軟體定義無線電技術分析RFID與LTE系統間之干擾
論文名稱(英文) Interference Analysis between RFID and LTE Using Software Defined Radio
校院名稱 成功大學
系所名稱(中) 電信管理研究所
系所名稱(英) Institute of Telecommunications and Management
學年度 104
學期 2
出版年 105
研究生(中文) 李威杰
研究生(英文) Wei-Chieh Lee
學號 R96031094
學位類別 碩士
語文別 中文
論文頁數 55頁
口試委員 口試委員-林福林
口試委員-林易泉
口試委員-李威勳
指導教授-陳文字
中文關鍵字 軟體定義無線電  系統干擾長期演進技術  無線射頻辨識系統  GNU Radio 
英文關鍵字 Software Defined Radio  System Interference  LTE  RFID  GNU Radio 
學科別分類
中文摘要 近幾年來無線通訊發展的技術可說是日新月異,4G LTE近幾年於台灣快速的發展,然而4G所需要使用的頻譜需求量是非常大的,因此頻譜的分配成了一門非常重要的課題。台灣4G第一次頻譜釋出最為人所爭議的其中一個頻段就是台灣之星的下行930MHz~940MHz,該頻段和高速公路電子收費系統的遠通電收所使用的RFID系統使用頻段:922.75MHz和924.25MHz非常接近,而保護頻帶的寬度只有約5MHz,如此一來兩個不同系統可能會有發生干擾的情形。
然而頻譜干擾是非常難以監測的一項任務,以目前的技術發展而言,要做出高品質的頻譜間干擾評估必須花費相當多的金錢和時間。近年來軟體定義無線電(Software-defined Radio : SDR) 發展逐漸成熟,而SDR最廣為人知的優勢就是具有高度的彈性以及低成本的開發環境,因此較容易從中取得有用的資料,本研究因此決定採用使用 SDR 並利用其優勢來評估干擾的情形,本研究總共提出了四種實驗情境並搭配SDR硬體USRP (Universal Software Radio Peripheral) 發射射頻電波來進行兩種系統間的干擾實驗。
經過本研究的實驗結果得出,兩個系統間確實會發生干擾,而一直要到約12MHz的保護頻帶 (guard band) 才不對彼此產生影響,而約在10MHz保護頻帶時,相互的干擾效果就已經不明顯,因此本研究根據實驗結果所提出的建議保護頻帶為10MHz~12MHz之間,就看監理機關和兩個業者間要如何做取捨。
英文摘要 Wireless communication is developing rapidly, and while the fourth generation (4G) Long Term Evolution (LTE) has been implemented in Taiwan, it requires a lot of spectrum resources, thus making spectrum allocation much more important than before. One telecoms operator, Taiwan Star Telecom, obtained the spectrum license from 930MHz to 940MHz in the first 4G spectrum auction. The freeway Electronic Toll Collection (ETC) system in Taiwan uses 922.75MHz and 924.25MHz for its Radio Frequency IDentification (RFID) system. However, with a guard band of less than 5MHz, these two systems may interfere with each other.
To examine such interference is a very difficult task, and would require much time and money. Software-defined Radio (SDR) has the advantages of flexibility and low cost, and thus in this work we use an SDR platform, GNU Radio, and the Universal Software Radio Peripheral (USRP) hardware, to evaluate the interference between these two systems with four different kinds of experiments. The evaluation indices include the frequency plot, constellation plot, and packet error rate.
The results of the experiments show that the guard band between the two systems needs to be 12MHz, although 10MHz is also acceptable, due to the limited spectrum resources in this context. It is anticipated that this finding can help regulators in their work here. Moreover, the results of this study show that SDR can be used to detect interference, and this is another promising application for this technology.
論文目次 摘要 I
誌 謝 VI
目錄 VII
圖目錄 IX
表目錄 XI
第一章 緒論 1
1.1研究背景與動機 1
1.2 研究目的 3
第二章 相關背景 4
2.1文獻回顧 4
2.2軟體定義無線電 7
2.2.1軟體定義無線電的概念 7
2.2.2軟體定義無線電的平台 8
2.2.3軟體定義無線電的硬體 9
2.3 LTE系統 11
2.3.1 LTE系統介紹 11
2.3.2 OFDM系統 13
2.4 RFID介紹 15
2.4.1 RFID原理 16
2.4.2 電子產品碼EPC 17
第三章 研究方法 19
3.1 LTE系統 20
3.2 RFID系統 23
3.3實驗情境設計 25
第四章 實驗結果分析 31
4.1實驗數據分析 31
4.2研究限制及探討 49
4.2.1研究限制 49
4.2.2研究探討 49
第五章 結論 51
參考文獻 53

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