科技產業的快速發展，電腦相關設備也不斷進步。為了提高監測系統克服新興通訊協定的能力，本研究利用軟體定義無線電 SDR (software defined radio) 技術，可取代傳統以硬體技術為基礎的通訊模組。本研究以軟體定義無線電概念導入廣播電視頻譜監測系統即時應用為目標，實作通道選擇、解調變、解碼與即時的視頻播放。使用兩種軟體定義無線電的設備，USRP (universal software radio peripheral) 與 RSP2 (radio spectrum processor 2) 做為廣播電視監測系統的接收機。GNU Radio是一個軟體開發平台，用於設計和分析數位訊號，如頻譜圖和星座圖。雖然SDR技術具有許多優點，但其取樣速率很快，因此會消耗大量計算機負載。因此，本研究分析當計算機用作具有SDR的無線電監控制站時，計算機的效能分析，包括CPU時鐘頻率、記憶體、硬碟和CPU核心數量的最低要求。除了透過進行裝置效能分析，並優化DVB-T(Digital Video Broadcasting-Terrestrial)軟體模組。本研究以軟體定義無線電架構完成的廣播電視即時監測系統，可低成本實現且方便修改和擴充新功能，可提供實務上於各地點做數位訊號量測與分析。

In recent years, computer science has been increasingly well developed. In order to improve the ability of radio monitoring system to overcome the challenge for new communication protocols, software defined radio (SDR) is a suitable technology rather than hardware-based modules. This research attempts to adopt the SDR technology to implement a DVB-T (digital video broadcasting-terrestrial) monitoring system, including channel selection, channel decoding, communication demodulation, video decoding, and real-time video playing. We also use two SDR devices,　USRP B200 (universal software radio peripheral with model B200) and RSP2 (radio spectrum processor 2) as the radio monitoring receivers. GNU Radio, a software development platform, is employed to design and analyze digital signals, such as spectrum plot and constellation diagram. Although the SDR technology has many advantages, it would consume lots of computer loading due to fast sampling rates. Therefore, the thesis also aims to analyze computer capability and performance to find out the minimum requirement including CPU clock rate, random access memory, hard disk, and the number of CPU cores, when the computer is used as a radio monitoring computing station with SDR receiver. The results show that CPU clock rate (GHz) multiplying the number of CPU cores should be greater than 11 for normal operations in the DVB-T radio monitoring. The radio and television real-time monitoring system implemented by the software defined radio architecture is a low cost solution and can provide practical radio signal measurement and analysis.

[1]國家通訊傳播委員會，“電波監測系統介紹，” [Online]. Available: https://www.ncc.gov.tw/chinese/news.aspx?site_content_sn=1309.
[2]J. Mitola, “Software radio architecture,” IEEE Communications Magazine, vol. 33, no. 5, pp. 26-38, May 1995.
[3]Enrico Buracchini, “The Software Radio Concept,” IEEE Communications Magazine, vol. 38, no. 9, pp. 138-143, Sep 2000.
[4]ITU, “Definitions of Software Defined Radio (SDR) and Cognitive Radio System (CRS),” Report ITU-R SM.2152, 2009.
[5]Stefan Valentin, Holger von Malm, Holger Karl, “Evaluating the GNU Software Radioplatform for wireless testbeds,” Technical Report TR-RI-06-273, Feb, 2006.
[6]P. Biswas, K. Das, D. Sharma, P. Boro, R. Nath, and A. J. Sarmah, “Implementation of Energy Detection Spectrum Sensing Using USRP N210 and GNU Radio,” International Journal of Electrical, Electronics and Data Communication, Vol. 4, no. 5, May, 2016.
[7]V. Pellegrini, G. Bacci, and M. Luise, “Soft-DVB: a fully-software GNURadio-based ETSI DVB-T modulator,” Proc. WSR, vol. 8, 2008.
[8]李卓澔，“數位電視通道解碼及解調變之實作，” 碩士論文，資訊工程研究所，國立北科技大學，2006.
[9]W. G. Chen, G. Zhao, S. Li, and J. S. Yang, “DVB-T Receiver Implementation Based on USRP,” Video Engineering., vol. 9, no. 38, pp. 155-159, May 2014.
[10]張古東，“以軟體定義無線電實作頻譜監測系統，”碩士論文，電信管理研究所，國立成功大學，2014.
[11]GNURadio, “GNURadio,” [Online]. Available: http://gnuradio.org/redmine/projects/show/gnuradio.
[12]Ettus Research, “USRP B200mini,” [Online]. Available: https://www.ettus.com/product/details/USRP-B200mini.
[13]SDRPlay, “RSP2,” [Online]. Available: http://www.sdrplay.com/rsp2/.
[14]ETSI, “Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for digital terrestrial television,” ETSI Std. EN 300 744 V1.6.2, Oct. 2015.
[15]BogdanDIA, “gr-dvbt,” [Online]. Available: https://github.com/BogdanDIA/gr-dvbt.
[16]BogdanDIA, “DVB-T implementation in GNUradio,” [Online]. Available: https://yo3iiu.ro/blog/?p=1220.
[17]VideoLAN, “VLC media player,” [Online].Available: https://www.videolan.org/vlc/index.zh-TW.html.