| MC-CDMA系统迭代检测中的一种信道估计算法 |
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| 引用本文： | 王鹏,姜华,刘海涛,杨根庆.MC-CDMA系统迭代检测中的一种信道估计算法[J].电路与系统学报,2004,9(5):141-144,113. |
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| 作者姓名： | 王鹏 姜华 刘海涛 杨根庆 |
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| 作者单位： | 上海微系统与信息技术研究所,上海,200050 |
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| 基金项目： | 中国科学院创新基金资助项目 |
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| 摘 要： | 在DS—CDMA系统中，联合译码的迭代多用户检测是克服多址干扰增加系统容量的有效方法。本文将多用户检测和译码相结合的迭代检测技术应用于MC—CDMA系统，其中，多用户检测器由串行干扰消除和其后的MMSE滤波器组成。文中提出一种时域信道估计作为迭代初始值的频域信道估计算法，比单纯的频域信道估计方法节约导频符号数量，并且由于信道估计性能的改善，加快了迭代检测的收敛速度。
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| 关 键 词： | MC—CDMA 串行干扰消除 信道译码 迭代 信道估计 |
| 文章编号： | 1007-0249(2004)05-0141-05 |
A New Channel Estimation Algorithm for Iterative Detection of MC-CDMA Systems |
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| WANG Peng,JIANG Hua,LIU Hai-tao,YANG Gen-qing.A New Channel Estimation Algorithm for Iterative Detection of MC-CDMA Systems[J].Journal of Circuits and Systems,2004,9(5):141-144,113. |
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| Authors: | WANG Peng JIANG Hua LIU Hai-tao YANG Gen-qing |
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| Abstract: | It has been proved that iterative multiuser detection with decoding is a very effective way to increase system capacity in DS-CDMA systems. Adapting this methodology to MC-CDMA, the multiuser detector is implemented as successive interference canceller with post-minimum mean squared error filtering. A new channel estimation algorithm is proposed for the iterative detection. According to the algorithm, time domain channel estimation with pilot symbols is used as the algorithm for the initial value of iteration processing. Compared with the frequency-domain-only algorithm, the proposed algorithm requires less pilot symbols with faster iteration convergence due to the better channel estimation effect. |
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| Keywords: | MC-CDMA successive interference cancellation channel decoding iteration channel estimation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
