| 多径信道的盲序列检测 |
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| 引用本文： | 王东昱,张欣,杨大成.多径信道的盲序列检测[J].北京邮电大学学报,2007,29(1):40-43. |
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| 作者姓名： | 王东昱 张欣 杨大成 |
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| 作者单位： | 北京邮电大学,无线通信中心,北京,100876 |
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| 摘 要： | 为了提高接收机在检测发送序列的性能，对多径信道的盲序列检测进行了改进，建立了节点总度量的递推方程，同时定义了分枝转移度量的更新量. 改进后的算法可以同时完成信道信息的估计和发送序列的检测.其中信道信息由自适应滤波器实时估计.仿真结果表明, 新的度量递推算法在比特误码性能上接近全序列比较欧氏距离的最佳算法，但计算速度提高了.
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| 关 键 词： | 盲序列检测 累积度量 分枝转移度量 改进型VA |
| 文章编号： | 1007-5321（2007）01-0040-04 |
| 收稿时间： | 2006-01-05 |
| 修稿时间： | 2006年1月5日 |
Blind Sequence Estimation Under the Multi-Path Channel |
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| WANG Dong-yu,ZHANG Xin,YANG Da-cheng.Blind Sequence Estimation Under the Multi-Path Channel[J].Journal of Beijing University of Posts and Telecommunications,2007,29(1):40-43. |
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| Authors: | WANG Dong-yu ZHANG Xin YANG Da-cheng |
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| Affiliation: | Wireless Communication Center Beijing University of Posts and Telecommunications，Beijing 100876, China |
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| Abstract: | To improve the performance of detecting the transmitted sequence,the Viterbi algorithm(VA) used in the multi-path channels was modified.The recursive metric equation was built and the renewed branch transition metric was given.The modified VA can estimate the channel information and detect the transmitted sequence simultaneously.Meanwhile,the channel information can be estimated by adaptive filter.The simulation results showed that the modified VA is near to the optimal algorithm,however,its computational speed was faster than the optimal algorithm. |
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| Keywords: | blind sequence estimation cumulative metric branch transition metric modified Viterbi algorithm |
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