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SC-FDMA上行系统中一种频域迭代块DFE均衡方法 被引量：2

Frequency domain iterative block DFE for SC-FDMA uplink system
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摘要 针对多径衰落信道条件下多用户单载波频分多址(SC-FDMA)上行系统中的符号间干扰和多用户间干扰问题,结合分集合并,设计了一种新的多用户SC-FDMA接收结构,并在此基础上提出了一种频域迭代块判决反馈均衡方法.该方法利用输入-判决符号相关系数,优化前馈滤波器和反馈滤波器的抽头系数,使得每次迭代过程中信号的信干噪比最大,逐步消除干扰,提高了数据检测的可靠性.仿真结果表明,该均衡方法有较好的误比特率性能. Focusing on intersymbol interference（ISI） and multiuser interference（MUI） existing in singlecarrier frequency-division multiple access （SC-FDMA） in multipath fading channels, a new multiuser receiver based on diversity combining is designed, and a novel frequency domain iterative block decision feedback equalization（DFE） approach for multiuser SC-FDMA is proposed. By exploiting the input-decision correlation, it optimizes the tap coefficients of the feedforward and feedback filters, in such a way that the maximized signal-to-interference-plus-noise ratio （SINR） is achieved for each iterative process, thus removing residual interference, and gradually improving the reliability of the detected data. Simulation results show that the proposed approach effectively reduces the bit error rate（BER） and provides significant robustness against multipath fading.
作者 王秋才 袁超伟 张金波 李映雪
机构地区 北京邮电大学信息与通信工程学院 长安大学电子与控制工程学院 北京邮电大学电子工程学院
出处 《西安电子科技大学学报》 EI CAS CSCD 北大核心 2013年第2期25-30,共6页 Journal of Xidian University
基金 国家自然科学基金资助项目(60872149)
关键词 单载波频分多址 符号间干扰 频域 判决反馈均衡 single-carrier frequency-division multiple access （SC-FDMA） intersymbol interference （ISI） frequency domain（FD） decision feedback equalization（DFE）
分类号 TN929.5 [电子电信—通信与信息系统]
  • 相关文献

参考文献13

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二级参考文献9

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同被引文献13

  • 1张俊杰,葛万成.Zadoff-Chu序列在LTE下行链路频偏估计中的应用[J].电子技术（上海）,2010,37(12):65-66. 被引量：3
  • 2王文博,郑侃.宽带无线通信OFDM技术[M].2版.北京:人民邮电出版社.2007.
  • 33GPP TS 36. 211 V8.4.0,Evolved Universal Terrestrial Ra- dio Access ( E-UTRA ) ; Physical Channels and Modulation [S]. Valbonne: 3GPP Organizational Partners Publications Offices, 2008.
  • 4Moose P H. A technique for orthogonal frequency division multiplexing frequency offset correction [ J ]. IEEE Transac- tions on Communications, 1994,42 (10) :2908 - 2914.
  • 53GPP TS 36. 104 V9.6. 0, Evolved Universal Terrestrial Radio Access ( E-UTRA ) ; Base Station (BS) Radio Trans- mission and Reception [ S ]. Valbonne : 3GPP Organizational Partners Publications Offices,2010.
  • 6Chaudhari S, Koivunen V, PoorH V. Autocorrelation-based decentralized sequential detection of OFDM signalsin cognitive radios [ J ]. Signal Processing, IEEE Transac-tions on, 2009,57(7) : 2690-2700.
  • 7Bokharaiee S, Nguyen H H, Shwedyk E. Blind spectrumsensing for OFDM-based cognitive radio systems [ J ].IEEE Transactions on Vehicular Technology, 2011, 60(3) : 858-871.
  • 8Axell E,Larsson E G. Optimal and sub-optimal spectrumsensing of OFDM signals in known and unknown noise va-riance[ J]. IEEE Journal on Selected Areas in Communi-cations ,2011, 29(2) : 290-304.
  • 9廖腾达,谢显中,郑品莲.基于循环前缀的LTE系统多普勒频偏估计算法[J].电视技术,2010,34(1):56-58. 被引量：9
  • 10唐宏,方文平,孙伟.一种LTE系统中基于循环前缀的载波频偏估计方法[J].电子测试,2010,21(4):4-7. 被引量：5

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西安电子科技大学学报
2013年 第2期

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