一种LTE自适应参数MMSE信道估计算法
在工程中,为了达到高速率的数据传输和良好的外场接收性能,LTE系统通常采用最小均方误差(MMSE)信道估计方法。针对传统的MMSE算法对多径时变信道的适应能力较差,提出了一种自适应参数MMSE信道估计系数调整算法。通过对信道均方根时延扩展(RMS Delay Spread)和对信噪比的估计,自适应地调整信道估计参数并生成准最佳的MMSE信道估计系数进行滤波。仿真结果表明,此算法比固定系数的MMSE信道估计算法有更好的信道估计性能。...
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Published in | 电子技术应用 Vol. 41; no. 12; pp. 87 - 89 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
上海科技大学信息学院,上海200031%中国科学院上海微系统与信息技术研究所,上海,200050%上海瀚讯无线技术有限公司,上海,200050
2015
中国科学院上海微系统与信息技术研究所,上海200050 |
Subjects | |
Online Access | Get full text |
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Summary: | 在工程中,为了达到高速率的数据传输和良好的外场接收性能,LTE系统通常采用最小均方误差(MMSE)信道估计方法。针对传统的MMSE算法对多径时变信道的适应能力较差,提出了一种自适应参数MMSE信道估计系数调整算法。通过对信道均方根时延扩展(RMS Delay Spread)和对信噪比的估计,自适应地调整信道估计参数并生成准最佳的MMSE信道估计系数进行滤波。仿真结果表明,此算法比固定系数的MMSE信道估计算法有更好的信道估计性能。 |
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Bibliography: | Chang Zhiwei, Bu Zhiyong, Jing Zhenhai (1.Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China; 2.School of Information Science and Technology, ShangTech University, Shanghai 200031, China; 3.Jushri Technologies Inc ,Shanghai 200050, China) 11-2305/TN minimum mean square error estimation;adaptive parameters;RMS delay spread;SNR In order to achieve a high-rate data transmission and good outfield reception performance in engineering project, LTE systems typically use a minimum mean square error(MMSE) channel estimator. Against the poor adaptability of traditional MMSE al- gorithm for time-varying multipath channel, an adaptive parameter MMSE channel estimation coefficient adjusting algorithm is pro- posed. This algorithm estimates the channel RMS delay spread (RMS Delay Spread) and SNR and calculates the channel estimation parameters adaptively to generate sub-optimal MMSE channel estimator coefficients. Simulation results show that the algorithm has a b |
ISSN: | 0258-7998 |
DOI: | 10.16157/j.issn.0258-7998.2015.12.023 |