| 一种低复杂度的DFT-S-OFDM系统迭代检测算法 |
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| 引用本文： | 芮赟,胡宏林,李明齐,易辉跃.一种低复杂度的DFT-S-OFDM系统迭代检测算法[J].高技术通讯,2009,19(5). |
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| 作者姓名： | 芮赟 胡宏林 李明齐 易辉跃 |
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| 作者单位： | 中国科学院上海微系统与信息技术研究所,上海,200050 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，上海市科学技术委员会标准专项基金 |
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| 摘 要： | 针对LTE上行的单载波频分多址系统--离散傅立叶变换扩频的正交频分复用(DFT-S-OFDM)系统,提出了一种低复杂度的迭代检测实现方法.由于传统方法根据发射机与信道级联系统的等效传输矩阵,完成最小均方误差(MMSE)的迭代检测,但非对角矩阵求逆复杂度较高,因此,所提出的新方法对发送端DFT扩频后的信号先进行单点的MMSE检测,然后根据逆离散傅立叶变换(IDFT)解扩后的后验均值和方差等效得到输出外信息比特似然比.仿真结果表明,所提出迭代检测接收算法的性能与传统方法相近,而其实现复杂度则有较大降低.
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| 关 键 词： | 离散傅立叶变换扩频的正交频分复用(DFT-S-OFDM) 迭代检测 卷积码 最小均方误差(MMSE) |
A low-complexity iterative detection algorithm for DFT-S-OFDM systems |
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| Rui Yun,Hu Honglin,Li Mingqi,Yi Huiyue.A low-complexity iterative detection algorithm for DFT-S-OFDM systems[J].High Technology Letters,2009,19(5). |
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| Authors: | Rui Yun Hu Honglin Li Mingqi Yi Huiyue |
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| Affiliation: | Rui Yun,Hu Honglin,Li Mingqi,Yi Huiyue(Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050) |
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| Abstract: | A complexity reduced iterative detection method for single-carrier frequency division multi-access systems (discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) systems) is proposed in this paper. For the traditional method,the minimum-mean-squared error (MMSE) iterative detection is implemented based on the e- quivalent transform matrix,thus resulting the higher complexity for the non-diagonal matrix inversion,therefore,the pro- posed method first performs the MMSE esti... |
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| Keywords: | discrete Fourier transform spread orthogonal frequency division multiplexing(DFF-S-OFDM) iterative detection convolution code minimum-mean-squared error(MMSE) |
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