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衰落信道下加权抵消的线性并行干扰消除多用户检测器 被引量：3

Weight-cancelled linear parallel interference canceller on fading channels
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摘要 在衰落信道下,提出了具有加权抵消的线性并行干扰消除多用户检测器(weight-cancelled linear parallel interference canceller,WLPIC),不同于传统的线性并行干扰消除检测器(linear parallel interference canceller,LPIC)估计多址干扰的方法,WLPIC利用前一级软输出乘以一个相应的加权系数来恢复后一级期望用户信号中的多址干扰,并进行干扰抵消。基于最小均方误差准则,给出了加权系数的计算公式。对WLPIC进行了误码性能分析。理论分析和仿真结果表明,WLPIC能有效地克服远近效应,性能优于LPIC和匹配滤波检测器。 A weight-cancelled linear parallel interference canceller（WLPIC） on fading channels is presented.Unlike the conventional linear parallel interference canceller（LPIC）,WLPIC estimates and cancels the multiple access interference（MAI） for a desired user in a stage through using the weighed factors to weight all the other users＇ soft outputs from the previous stage.The weighted factor formula for different stages is derived from the minimum mean square error（MMSE） criterion,and the BER performance of WLPIC is discussed.Theoretical analysis and simulation results show that WPLIC has robustness to near-far effect and outperforms LPIC and the MF detector significantly.
作者 张东红 廖桂生
机构地区 西安电子科技大学雷达信号处理国家重点实验室 安康学院应用数学系
出处 《系统工程与电子技术》 EI CSCD 北大核心 2010年第5期881-885,共5页 Systems Engineering and Electronics
基金 国家自然科学基金(60736009 60825104) 陕西省教育厅专项科研基金(08JK208)资助课题
关键词 并行干扰消除 多址干扰 加权系数 最小均方误差准则 误码性能 parallel interference cancellation multiple access interference（MAI） weighted factor minimum mean square error（MMSE） criterion bit error rate（BER） performance
分类号 TN914.4 [电子电信—通信与信息系统]
  • 相关文献

参考文献13

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同被引文献42

  • 1吴琦,申敏.多级并行干扰消除改进算法的仿真研究[J].系统仿真学报,2004,16(7):1392-1394. 被引量：2
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引证文献3

二级引证文献4

系统工程与电子技术
2010年 第5期

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