| 适用于慢衰落信道的联合最大似然序列估计 |
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| 引用本文： | 李赞,常义林,金力军,蔡觉平.适用于慢衰落信道的联合最大似然序列估计[J].电波科学学报,2005,20(1):59-63. |
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| 作者姓名： | 李赞 常义林 金力军 蔡觉平 |
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| 作者单位： | 西安电子科技大学ISN国家重点实验室,陕西,西安,710071;上海交通大学,电子工程系,上海,200030 |
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| 摘 要： | 为了克服移动通信中存在的多径衰落效应,基于Viterbi算法的最大似然序列估计需要不断跟踪信道参数的变化.在建立有限带宽信号的多径衰落信道传输模型的基础上,提出了一种适合于慢衰落信道特性的降阶联合信道跟踪与最大似然均衡算法D-PSP.该方法根据信道特性选择不同的降阶维数N,在保证数据正确接收率的条件下,不同程度的有效减小PSP算法的计算时间和存储空间.
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| 关 键 词： | 最大似然序列估计 捕获 跟踪 D-PSP Viterbi算法 |
| 文章编号： | 1005-0388(2005)01-0059-05 |
| 修稿时间： | 2003年5月29日 |
Joint data and channel estimation for slow fading channels |
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| LI Zan,CHANG Yi lin,JIN Li jun,CAI Jue ping.Joint data and channel estimation for slow fading channels[J].Chinese Journal of Radio Science,2005,20(1):59-63. |
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| Authors: | LI Zan CHANG Yi lin JIN Li jun CAI Jue ping |
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| Institution: | LI Zan 1 CHANG Yi lin 1 JIN Li jun 1 CAI Jue ping 2 |
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| Abstract: | In mobile communications, a continuous channel estimation and tracing method is needed to implement MLSE because of multi path and fading effects. Based on the analysis of channel model for band limited signals, a suboptimal D PSP (Dimension down PSP) algorithm is presented in this paper, which agrees with the slow fading characteristic of multi path channels. Performing the principle of per survivor processing, the D PSP can save the computational time and memory size effectively, which makes the MLSE possible for adaptive modulation and coding systems. Computer simulation results are included to support the developments. |
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| Keywords: | D-PSP |
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