近來無線通訊已在各種環境中普遍的使用。為了使這些應用有最佳效能，研究各個環境的傳輸通道是相當重要的。
一般而言，傳輸通道的研究需要大量的量測及數據的統計分析，以獲得周詳的通道狀態資訊，進而利用其量測分析之數據建立一近似的通道模型。
本論文開發一展頻滑動相關器之通道量測器，且使用互相關特性較佳之 Kasami序列做為展頻碼，實現其系統於軟體無線電平台上，用於本論文之通道量測實驗。歸功於軟體無線電技術，其量測系統可以隨意的調整操作頻率及展頻碼等等參數的優點，使得通道的量測能依照各個量測環境特性而進行彈性的修正。
本論文呈現於900MHz UHF 頻段的室內通道量測之研究成果，並針對其量測環境之功率延遲分佈及 RMS 延遲分佈等等通道特性進行分析及討論。
根據量測結果，本論文提出了以 Tap delay line 方法為依據的室內 UHF 小尺度衰落通道模型；本論文也提供了其通道模型的模擬結果與實驗數據的分析比較。

Recently wireless communications have been used pervasively in various environments. To make the best use of these applications, it is important to study the propagation channels corresponding these scenarios.
Generally, it requires massive measurement and analytical statistical data analysis to obtain comprehensive channel state information and to build an approximate channel model.
In this work, we develop a sliding correlator based channel sounder with Kasami sequences over a software defined radio platform, which is used in our channel measurement. Thanks to the software defined radio technology, the channel sounder has advantages of changing operation frequencies and spreading sequences, which is very convenient for channel measurement in various environments.
This thesis presents some measurement results of 900MHz UHF band indoor propagation, and their corresponding channel characteristics including power delay profile and RMS delay spread.
An indoor UHF small scale fading channel model in terms of tap delay line fashion is proposed based on the measurement results. Comparisons of computer simulation results using the channel model and the experimental data are also provided in this thesis.

[1] B. Sklar, "Rayleigh fading channels in mobile digital communication systems .I. Characterization," IEEE Communications Magazine, vol. 35, pp. 90-100, 1997.
[2] S. Salous, Radio propagation measurement and channel modelling: John Wiley & Sons, 2013.
[3] T. Rappaport, Wireless Communications: Principles and Practice: Prentice Hall PTR, 2001.
[4] R. J. Pirkl, "A sliding correlator channel sounder for ultra-wideband measurements," Master, Electrical and Computer Engineering, Georgia Institute of Technology, 2007.
[5] M. Anderson, G. Borg, and R. Goodwin, "Channel Sounding Measurements at 59.5 MHz Across the Australian Capital Territory," in 2005 Asia-Pacific Conference on Communications, 2005, pp. 705-709.
[6] C.-M. Huang, "基於軟體定義無線電之通道量測: 設計與實現," 成功大學電腦與通信工程研究所學位論文, pp. 1-33, 2015.
[7] D. Cassioli, M. Z. Win, and A. F. Molisch, "The ultra-wide bandwidth indoor channel: from statistical model to simulations," IEEE Journal on selected areas in Communications, vol. 20, pp. 1247-1257, 2002.
[8] R. J. Pirkl and G. D. Durgin, "Optimal Sliding Correlator Channel Sounder Design," IEEE Transactions on Wireless Communications, vol. 7, pp. 3488-3497, 2008.
[9] T. S. Rappaport, S. Y. Seidel, and K. Takamizawa, "Statistical channel impulse response models for factory and open plan building radio communicate system design," IEEE Transactions on Communications, vol. 39, pp. 794-807, 1991.
[10] H. T. William, P. T. Desmond, E. Z. Rodger, F. M. Nicholas, and W. M. Jon, "A Statistical Model for Indoor Multipath Propagation," in The Best of the Best:Fifty Years of Communications and Networking Research, ed, 2007, pp. 127-136.
[11] M. Patzold, A. Szczepanski, and N. Youssef, "Methods for modeling of specified and measured multipath power-delay profiles," IEEE Transactions on Vehicular Technology, vol. 51, pp. 978-988, 2002.
[12] S. Kalyanaraman. Point-to-Point Wireless Communication. Available: http://slideplayer.com/slide/5241587/
[13] L. Novosel and G. Šišul, "Comparison of pseudo noise sequence lengths for a correlator channel sounder," in Proceedings ELMAR-2014, 2014, pp. 1-4.
[14] M. A. Stephens, "EDF statistics for goodness of fit and some comparisons," Journal of the American statistical Association, vol. 69, pp. 730-737, 1974.
[15] R. Steele and L. Hanzo, Mobile Radio Communications: Second and Third Generation Cellular and WATM Systems: 2nd: IEEE Press-John Wiley, 1999.
[16] R. Steele and L. Hanzo, "Characterisation of Mobile Radio Channels," in Mobile Radio Communications, ed: Wiley-IEEE Press, 1999, pp. 91-185.
[17] R. Jain. (2007). Channel Models : A Tutorial (1 ed.). Available: https://www.google.com.tw/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjdqPj11fLNAhVItJQKHeF8Bg0QFgghMAA&url=https%3A%2F%2Fwww.researchgate.net%2Ffile.PostFileLoader.html%3Fid%3D56bb4de964e9b2f33e8b45b0%26assetKey%3DAS%253A327593363558400%25401455115752451&usg=AFQjCNF-nGnr1WpcVHJg0sjtruuSqu8w7w&sig2=80AsDz2-ffSEQ_XUewCy2Q
[18] J. Karedal, A. J. Johansson, F. Tufvesson, and A. F. Molisch, "A Measurement-Based Fading Model for Wireless Personal Area Networks," Wireless Communications, IEEE Transactions on, vol. 7, pp. 4575-4585, 2008.
[19] J. B. Andersen, T. S. Rappaport, and S. Yoshida, "Propagation measurements and models for wireless communications channels," Communications Magazine, IEEE, vol. 33, pp. 42-49, 1995.
[20] F. J. Massey Jr, "The Kolmogorov-Smirnov test for goodness of fit," Journal of the American statistical Association, vol. 46, pp. 68-78, 1951.
[21] P. Bello, "Characterization of Randomly Time-Variant Linear Channels," Communications Systems, IEEE Transactions on, vol. 11, pp. 360-393, 1963.
[22] Y. S. Cho, J. Kim, W. Y. Yang, and C. G. Kang, MIMO-OFDM wireless communications with MATLAB: John Wiley & Sons, 2010.
[23] D. C. Cox and R. Leck, "Distributions of multipath delay spread and average excess delay for 910-MHz urban mobile radio paths," Antennas and Propagation, IEEE Transactions on, vol. 23, pp. 206-213, 1975.
[24] D. Devasirvatham, "Time delay spread and signal level measurements of 850 MHz radio waves in building environments," IEEE Transactions on Antennas and Propagation, vol. 34, pp. 1300-1305, 1986.
[25] Z. Di, W. Hongqing, J. Xiang, X. Chengwen, F. Zesong, and W. Hualei, "A new ultra-wideband high-frequency channel model," in Signal and Information Processing (ChinaSIP), 2015 IEEE China Summit and International Conference on, 2015, pp. 923-927.
[26] D. Greenwood and L. Hanzo, "Characterisation of mobile radio channels: 2nd," 1999.
[27] M. Hata, "Empirical formula for propagation loss in land mobile radio services," IEEE transactions on Vehicular Technology, vol. 29, pp. 317-325, 1980.
[28] P. Hoeher and E. Haas, "Aeronautical channel modeling at VHF-band," in Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th, 1999, pp. 1961-1966 vol.4.
[29] J. A. Pugh, R. J. Bultitude, and P. J. Vigneron, "Propagation measurements and modelling for multiband communications on tactical VHF channels," presented at the MILCOM 2007-IEEE Military Communications Conference, 2007.
[30] S. Y. Seidel, T. S. Rappaport, S. Jain, M. L. Lord, and R. Singh, "Path loss, scattering and multipath delay statistics in four European cities for digital cellular and microcellular radiotelephone," Vehicular Technology, IEEE Transactions on, vol. 40, pp. 721-730, 1991.