| 一种新的半盲联合信道数据估计算法 |
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| 引用本文： | 白栋,刘红,梁庆林.一种新的半盲联合信道数据估计算法[J].通信学报,2004,25(11):43-48. |
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| 作者姓名： | 白栋 刘红 梁庆林 |
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| 作者单位： | 1. 北京大学,电子学系卫星与移动通信实验室,北京,100871
2. 北京邮电大学,宽带通信网络实验室,北京,100876 |
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| 基金项目： | 国家自然科学基金资助项目(90204001) |
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| 摘 要： | 提出一种新的半盲联合信道估计与数据检测器,通过将递归-EM信道估计算法嵌入Turbo均衡器中,根据接收信号进行逐符号信道估计,不但能够适应时变信道,而且有效提高了联合信道数据估计收敛速度。仿真表明本算法对初始信道响应估计精度要求很低,从而大大降低了对训练序列长度的要求,使用很短的训练序列就能够达到较好性能,有效提高了频谱利用率。
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| 关 键 词： | 信号检测 递归-EM算法 Turbo均衡 半盲联合信道数据估计 渐近ML估计 |
| 文章编号： | 1000-436X(2004)11-0043-06 |
| 修稿时间： | 2004年4月21日 |
A novel semi-blind joint channel parameters and data estimator |
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| BAI Dong,LIU Hong,LIANG Qing-lin.A novel semi-blind joint channel parameters and data estimator[J].Journal on Communications,2004,25(11):43-48. |
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| Authors: | BAI Dong LIU Hong LIANG Qing-lin |
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| Abstract: | A novel semi-blind joint channel parameters and data estimator was presented in this article. Recursive expectation-maximization (EM) algorithm and Turbo equalization were combined to estimate unknown time-invariant/variant channel parameters symbol by symbol. The recursive times needed for converging are much decreased. Simulation results show that the proposed method works well with rough initialization of channel parameters obtained from very short train sequence, which lead to high spectrum efficiency. |
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| Keywords: | signal detection recursive expectation-maximization Turbo equalization semi-blind joint channel parameters and data estimation asymptotic ML estimation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
