臺灣博碩士論文加值系統

軟體無線電（Software Define Radio）架構的核心概念在於不使用混波器（mixer）以及將類比/數位轉換器（analog-to-digital converter）盡可能的靠近天線端。如此一來，我們可以將更多通訊系統的功能以軟體實現。帶通取樣是一種有效直接降頻而不需要使用混波器的一種方法。雖然針對單一射頻訊號的帶通取樣定理已經發展成熟，但是在對於兩個或者是多個以上的射頻訊號的帶通取樣理論的發展卻還不夠成熟。在本篇論文中，我們將推導出適用於對多個單旁波帶的射頻訊號的帶通取樣的通式。。這個方法利於程式的設計。如此一來，更符合軟體無線電架構的核心觀念。

The kernel concept of the software defined radio (SDR) is to annul the mixers and to place analog-to-digital converters as near the antenna as possible [2]. The reason why is that we can implement the most SDR functionality to a programmable micro or signal processor. Bandpass sampling is a helpful method for direct digital downconversion without mixers. Although the bandpass sampling theory for single RF signal is well developed, however, for two or more RF signals is relatively immature. In this thesis, we derived the general equations which are related to the bandpass sampling of multiple single-side-band RF signals. This is good to design the program to compute. That is meeting the center idea behind the software radio architecture.

中文摘要..................................................................................................Ⅰ
ABSTRACT……………………………………………………………Ⅱ
致謝……………………………………………......................................Ⅲ
CONTENTS……………………………………………………………Ⅳ
LIST OF FIGURES……………………………………………………Ⅵ
LIST OF TABLES……………………………………………………..Ⅸ
CHAPTER 1 INTRODUCTION…………………………………….…1
1-1 Introduction of SDR………………………………………...1
1-2 Research goal……….………………………………………1
1-3 Thesis organization…………………………………………5
CHAPTER 2 SAMPLING THEORY………………………………….3
2-1 Nyquist Sampling Principle………………………………..3
2-2 Bandpass Sampling………………………………………...3
2-3 Review and discuss the bibliographies about bandpass sampling……………………………………………………7
2-4 Introduce Complex Signal Bandpass Sampling…………..17
2-5 A paper about complex signals using bandpass sampling..22
CHAPTER 3 DEVELOP THE ALOGRITHM FOR ARBITRARY NUMBER COMPLEX SIGNALS...………………...25
3-1 Deriving the formula of two complex signals……………..25
3-2 Deriving the formula of three complex signals……………28
3-3 Deriving the algorithm of arbitrary complex RF signals….35
3-4 Developing the program of arbitrary number complex signals…………………………………………..…………36
CHAPTER 4 DESIGN THE PROGRAM FOR ARBITRARY COMPLEX SIGNALS AND SIMULATIONS……………………….59
4-1 Introduce the flow of the programs……………………….59
4-2 The result of simulation…………………………………...63
CHAPTER 5 CONCLUSIONS……………………………………….65
REFERENCE………………………………………………………….66

[1] Mark Cummings, Cadence Wireless Design Services Shinichiro Haruyama, Keio University, “FPGA in the software radio,” IEEE Communications Magazine, pp. 108-112, February 1999.
[2] Joe Mitola, “The software radio architecture,” IEEE Communications Magazine, vol. 33, no 5, pp. 26-38, May 1995.
[3] Rodney G. Vaughan, Neil L. Scott, and D. Rod White, “The theory of bandpass sampling,” IEEE Transactions on Signal Processing, vol. 39, no. 9. September 1991.
[4] Dennis M. Akos, Michael Stockmaster, James B. Y. Tsui, and Joe Cashera, “Direct bandpass sampling multiple distinct RF signals,” IEEE Transactions on Communications, vol. 47, no. 7, July 1999.
[5] N. Wong and T-S Ng, “An efficient algorithm for downconverting multiple bandpass signals using bandpass sampling,” Proc. IEEE Int. Conf. Commun., Helsinki, Finland, June 2001, vol. 3, pp.910-914.
[6] Ching-Hsiang Tseng and Sun-Chung Chou, “Direct downconversion of multiple RF signals using bandpass sampling, ” IEEE Int. Conf. Commun., pp. 2003-2007, May 2003.
[7] Junghwa Bae, Won Ha and Jinwoo Park, “An algorithm for downconverting signals using complex bandpass sampling in SDR system,” The 14th IEEE 2003 Int. Symposium on Personal, indoor and Mobile Radio Commun. Proceedings, pp. 130-134.
[8] T. Hentchel, M. Henker, and G. Fettweis, “The digital front-end of software radio terminals,” IEEE Personal Commun. vol. 6, no. 4, pp. 40-46, August 1999.
[9] Bernard Sklar, Digital Communications, 2nd edition, Prentice-Hall International, Inc.
[10] Lin-En Hsige, Performance evaluation for direct downconversion of dual band signals,, Master thesis 2002, National Taiwan Ocean University.
[11] Chiao-Kuang Kung, Study on performance and architecture of software radio receiver, Master thesis 2001, National Chung Hsing University.
[12] Chou-Sun Chung, Bandpass sampling techniques for multiple distinct RF signals, Master thesis 2001, National Taiwan Ocean University.
[13] Hai-Hsing Lin, Bandpass sampling techniques for nonlinear communication channels, Master thesis 2001, National Taiwan Ocean University.
[14] Chih-Wei Chiu, The study of software radio receiver based on intermediate frequency sampling, Master thesis 2002, National Taiwan Ocean University.
[15] Nien-Chao Ming, Implementation of all-digital GFSK software radio transceiver, Master thesis 2000, National Taiwan Ocean University.
[16] Fred Chiou, Performance studying on software radio architecture, Master thesis 1999, National Chung Hsing University.