DSSS信號(hào)的擴(kuò)頻序列估計(jì)
Spread Spectrum Sequence Estimation for DSSS Signals
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摘要: 提出了一個(gè)在非協(xié)作通信中對(duì)直接擴(kuò)頻序列(Direct Spread Spectrum Sequence,DSSS)信號(hào)的擴(kuò)頻序列進(jìn)行估計(jì)的簡(jiǎn)單而有效的算法。在算法中我們提出了兩個(gè)測(cè)度函數(shù),一個(gè)用于搜索擴(kuò)頻序列在接收信號(hào)中的起始位置,另一個(gè)用于序列中的逐碼片(chip)估計(jì)。理論分析和計(jì)算機(jī)仿真表明了此算法的有效性。
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關(guān)鍵詞:
- 直接擴(kuò)頻序列信號(hào); 同步; 估計(jì)
Abstract: The paper proposes an effective algorithm to estimate the spread spectrum sequence of Direct Spread Spectrum Sequence (DSSS) signal, which is suitable for non-cooperative communication systems. Two measurement functions are suggested. One is used for sequence synchronization; the other is used for sequence estimation chip by chip. Only simple complex addition and multiplication are required in this algorithm. Both theoretic analysis and computer simulations show the effectiveness of this algorithm. -
朱近康.擴(kuò)展頻譜通信及其應(yīng)用.合肥:中國(guó)科學(xué)技術(shù)大學(xué)出版社,1993:289-343.[2]Viterbi A J著,李世鶴等譯.CDMA擴(kuò)頻通信原理.北京:人民郵電出版社,1997:1-4.[3]Dixon R C. Spread spectrum system. New York: John Wiley Sons, 1984:313 - 335.[4]Flikkema P G. Spread-spectrum techniques for wireless communication[J].IEEE Signal Processing Magazine.1997, 14(5):26-[5]田孝華,廖桂生.時(shí)變信道中CDMA信號(hào)的波達(dá)方向和直接擴(kuò)頻序列盲估計(jì).電子學(xué)報(bào),2002,30(9):1323-326.[6]Papoulis A. Probability, Random Variables and Stochastic Process. 4-th edition, Boston: McGraw-Hill, 2002:214 - 221. -
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