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頻譜有效的差分空時編碼CDMA系統(tǒng)

陳鐘麟 朱光喜 蔡瑋

陳鐘麟, 朱光喜, 蔡瑋. 頻譜有效的差分空時編碼CDMA系統(tǒng)[J]. 電子與信息學(xué)報, 2005, 27(2): 221-225.
引用本文: 陳鐘麟, 朱光喜, 蔡瑋. 頻譜有效的差分空時編碼CDMA系統(tǒng)[J]. 電子與信息學(xué)報, 2005, 27(2): 221-225.
Chen Zhong-lin, Zhu Guang-xi, Cai Wei . Spectrum-Efficient Differential Space-Time Coded CDMA Systems[J]. Journal of Electronics & Information Technology, 2005, 27(2): 221-225.
Citation: Chen Zhong-lin, Zhu Guang-xi, Cai Wei . Spectrum-Efficient Differential Space-Time Coded CDMA Systems[J]. Journal of Electronics & Information Technology, 2005, 27(2): 221-225.

頻譜有效的差分空時編碼CDMA系統(tǒng)

Spectrum-Efficient Differential Space-Time Coded CDMA Systems

  • 摘要: 該文針對碼分多址(Code-Division Multiple-Access,CDMA)系統(tǒng)提出了頻譜有效的差分空時傳輸方案??紤]包含M個同步共道用戶的多用戶環(huán)境,每一用戶配備雙發(fā)射天線。若接收端配備N2個接收天線,該方案將采用解相關(guān)檢測器和接收天線分集分離M個用戶。基于平坦Rayleigh衰落信道,給出了非相干譯碼器,它可為每一共道用戶提供2(N-1)的最小分集增益。與已有的差分空時編碼CDMA系統(tǒng)相比,該方案具有兩大優(yōu)勢:第一,僅需增加單個接收天線,該方案可在頻譜效率提高1/3的條件下顯著地改善系統(tǒng)性能;第二,譯碼僅具有線性復(fù)雜度。
  • Vahid Tarokh, Nambi Seshadir, Calderbank A R. Spacetime code for high data rate wireless communication: Performance analysis and code construction[J].IEEE Trans. on Information Theory.1998,44(2):744-[2]Vahid Tarokh, Hamid Jafarkhani, Calderbank A R. Space-time block codes from orthogonal designs[J].IEEE Trans. on Information Theory.1999, 45( 5):1456-[3]Alamouti M. A simple transmit diversity technique for wireless communications[J].IEEE J. on Selected Areas in Comm.1998,16(8):1451-[4]Hughes L. Double differential space-time coding for timeselective fading channels[J].IEEE Trans. on Comm.2001, 49(9):1529-[5]Hochwald B M, Sweldens W. Differential unitary space-time modulation[J].IEEE Trans. on Comm.2000, 48(12):2041-[6]Vahid Tarokh, Hamid Jafarkhani. A differential detection scheme for transmit diversity[J].IEEEJ. on Selected Areas in Comm.2000,18(7):1169-[7]Girish Ganesan, Petre Stoica. Differential modulation using space-time block codes[J].IEEE Signal Processing Letters.2002,9(2):57-[8]Chen Zhonglin, Zhu Guangxi, Shen Jing, Liu Yingzhuang.Differential space-time block codes from amicable orthogonal designs [A]. IEEE WCNC, New Orleans, LA, USA, 2003, 2:768 - 772.[9]Li Honghin, Li Jian. Differential and coherent decorrelating multiuser receivers for space-time-coded CDMA systems[J].IEEE Trans. on Signal Processing.2002, 50(10):2529-[10]Chen Zhonglin, Zhu Guangxi, Cai Wei, Ni Qiang. Differential space-time block-coded OFDMA for frequency-selective channels. IEEE PIMRC 2003, Beijing, China, 3:2171 - 2175.[11]Verdu S. Multiuser Detection, Cambridge, U.K.: Cambridge University Press, 1998. [12]Hassibi B, et al.. Representation theory for high-rate multipleantenna code design. IEEE Trans. on Information Theory, 2001,IT-47(6): 2335 - 2367.
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出版歷程
  • 收稿日期:  2003-08-04
  • 修回日期:  2004-12-16
  • 刊出日期:  2005-02-19

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