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博碩士論文 etd-0615100-014207 詳細資訊
Title page for etd-0615100-014207
論文名稱
Title
台灣地區FM頻帶場強預測曲線與電台設立規範之研究
A Study of FM-Band Radio Wave Propagation Prediction Curves and the Broadcasting Service Criterion in Taiwan
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
53
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2000-06-02
繳交日期
Date of Submission
2000-06-15
關鍵字
Keywords
地形起伏度、干擾/保護比、可信賴區間、預測曲線
Protection/Interference Ratio, Terrain Roughness, Confidence Interval, Prediction Curves
統計
Statistics
本論文已被瀏覽 5737 次,被下載 4209
The thesis/dissertation has been browsed 5737 times, has been downloaded 4209 times.
中文摘要
場強預測曲線為針對某一區域中特定電波傳播頻帶的電場強度量測所得之大量數據分析後所得之統計圖形,其所代表者為該區域中之各種自然或人為因素諸如地形、大氣狀況及建築物等對於電波傳播所造成之影響,其便利之處為吾人可輕易藉由圖表預估訊號強度與距離之大略關係,而不必藉由繁複的數值計算或現場的實地量測,同時配合電台間之干擾/保護比規範,對同頻及鄰頻電台干擾的場強及電台間設立之最小間距建立一套規範,使得電台設立的審核有一個參考的標準。

美國聯邦通訊委員會(Federal Communications Commission, FCC)根據美國之地理環境與大量的量測資料分析所獲得的統計結果,建立了F(50,50)電場強度預測曲線,並配合電台間之干擾保護比規範建立同頻與鄰頻電台間設立之最小間距限制。

目前國內對於廣播電台設立之審核,其相關規範仍是根據FCC所建議者,依據一般經驗,電波傳播之距離與信號強度之衰減會受到地形、氣候兩主要因素之影響,是故以台灣地區多山之地形與潮濕的氣候與美國大平原地形與乾燥氣候相比較,FCC所建議之電波傳播預測曲線在台灣是否仍然適用不無疑問。

藉由自中央大學遙測中心所取得之台灣地區數值地形資料庫之輔助產生電波傳播路徑上之二維地形剖面圖,本論文將以適合山地地形之電波傳播模型Deygout model及交通部電信總局所提供現有調頻廣播電台資料,藉由模擬出的大量數據分析出統計結果建立適合台灣地區之電場強度預測曲線配合干擾/保護比規範對於調頻廣播電台之同頻與臨頻電台間設立之最小間距做一符合現地需求之建議規範,以期達成最有效率之頻譜規劃。
Abstract
The field strength prediction chart is a set of statistical curves obtained through the analysis of huge amount of field strength measurement data of the specific radio band in some area. It reflects the natural or artificial effects such as geography, atmospheric condition and buildings, etc. that affect the radio wave propagation. One advantage is that we can predict the rough relationship between the field strength and distance easily. As a result, we don’t have to perform simulation field measurement in every radio planning. With prediction chart and field strength interference /protection ratio standard, we can suggest a minimum distance separation criterion between co-channel and adjacent channel broadcasting stations. It also provides a reference to authority to examine the broadcasting service application.

The FCC develops the F(50,50) charts and minimum separation between radio stations base on data collected in the U.S.. Presently, the regulations concerning the broadcasting applications in Taiwan still follow the FCC’s suggestion. In general, the field strength distribution is affected by two main factors: geography and atmospheric condition, which can be different from those in the U.S..

With the acquisition of digital terrain data of Taiwan, the terrain profile for a given path can be generated. In this thesis, we’ll use Deygout model and the database of existed broadcasting stations to generate field strength distribution database for each station and analyze the database to develop the prediction chart that is suitable for the propagation environment in Taiwan. When combine with the field strength interference /protection ratio standard, we’ll provide a minimum distance separation criterion of co-channel and adjacent channel in the FM band broadcasting stations. Our study can help the authority to achieve the most effective spectrum management in FM band.
目次 Table of Contents
致謝 i
摘要(中文) iii
摘要(英文) v
目錄 vi
圖表目錄 viii

第一章 導論 1

第二章 相關資料準備工作 4
2.1 現有發射站資料之建檔 4
2.2 台灣地區數位電子地形圖簡介        5
2.3 電子地形圖原始檔之編碼 9
2.4 二維地形剖面圖之產生 10
2.5 研究流程 13

第三章 相關之電波傳播模型 15
3.1 傳播模型採用之考量 15
3.2 Deygout 模型 17
3.3 傳輸損失與接收場強之轉換 20
第四章 以Deygout model建立台灣地區FM頻帶電波傳播預測線 22
4.1 FCC F(50,50)預測曲線 22
4.2 台灣地區FM頻帶電場強度預測曲線 25
4.3可信賴區間 30
4.4增加幅線數對HAAT所產生之影響 33
4.5改變距離區間對HAAT所產生之影響 35
4.6討論 38

第五章 地形起伏度Δh與地形起伏修正量ΔF 39
5.1地形起伏度Δh與地形起伏修正量ΔF 39
5.2台灣地區地形起伏度Δh與地形起伏修正量ΔF 41

第六章 FM廣播電台干擾分析 43
6.1 FM電台種類與設立之最小距離限制建議 43
6.2 FCC預測曲線製作方法適用討論 45

第七章 結論與未來研究 48

參考文獻 51
附錄一 常態機率分布函數之查表 53
參考文獻 References
[1] FCC, Part 73, 1986
[2] David R. Anderson, Dennis J. Sweeney and Thomas A. Williams, “Statistics for Business and Economics”, South-Western College Publishing, 1999
[3] J. Deygout, “Multiple Knife Edge Diffraction of Microwawes”, IEEE
Transactions on Antennas and Propagation, vol. AP-14, No.4, pp.480-489, July
1966.
[4] 葉公節、林根煌、郭志文、蘇裕晉、盧俊郎、陳啟惕,”建立台灣地區
TV-band (UHF/VHF)電波傳播模式(I)”,國立中山大學電機系,民國85年
[5] 盧俊郎,”二維電視頻段傳播模式及其預測場強與台灣南部地區測量值比
較”,國立中山大學85年碩士論文
[6] Masaharu Hata, “Empirical Formula for Propagation Loss in Land Mobile Radio Service”, IEEE Transactions on Vehicular Technology, vol. VT-29, No.3, pp.317-325, August, 1980.
[7] Steven C. Chapra and Raymond P. Canale, “Numerical Methods for Engineers”, McGraw Hill, 1994
[8] 交通部電信總局,”廣播電視無線電台設置使用管理辦法”,民國86年4月19日
[9] A. Altintas, O. Ocali, S.G. Tanyer and H.Kyomen, “Computer Aided Frequency
Planning for The Radio and TV Broadcasting”, IEEE Transactions on
Broadcasting, vol. 42, No.2, pp.144-148, June 1996
[10] Eldon J. Haakinson and Jean E. Adams, “Coverage and Interference for Second
Adjacent Channel FM Broadcast Stations”, IEEE Transactions on Broadcasting, vol. BC-26, No.4, pp.133-138 , December 1980
[11] T. Rama Rao and S.Vijaya Bhaskara Rao, ”Single Knife Edge Diffraction
Propagation Studies Over A Hilly Terrain”, IEEE Transactions on Broadcasting, vol. 45, No.1, pp.20-29, March 1999
[12] J. Deygout, “Correction Factor for Multiple Knife Edge Diffraction”, IEEE
Transactions on Antennas and Propagation, vol. 39, No.8, pp.1256-1258, August
1991
[13] Theodore S. Rappaport, “Wireless Communications Principles and Practice”,
Prentice Hall, 1996
[14] William C. Y. Lee, “Mobile Cellular Telecommunications Analog and Digital
Systems”, Mc-Graw Hill, 1995
[15] P. Rohan, “Introduction to Electromagnetic Wave Propagation”, Artec House, 1991
[16] 台灣大學電信研究中心,”廣播電台頻譜有效使用”,交通部電信總局委託研究計劃期末報告,民國88年
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