LTE上行多用户SC-FDMA系统中增强信道估计方法

doi:10.13190/jbupt.201106.86.yanglh

北京邮电大学学报 ›› 2011, Vol. 34 ›› Issue (6): 86-90.doi: 10.13190/jbupt.201106.86.yanglh

LTE上行多用户SC-FDMA系统中增强信道估计方法

杨丽花¹,任光亮¹,邱智亮²,³

1. 西安电子科技大学
2.
3. 通信工程学院

收稿日期:2010-12-21 修回日期:2011-07-07 出版日期:2011-12-28 发布日期:2011-10-18
通讯作者: 杨丽花 E-mail:yanglihua@mail.xidian.edu.cn
作者简介:杨丽花（1984-），女，博士生，E-mail：yanglihua@mail.xidian.edu.cn 任光亮（1971-），男，教授，博士生导师
基金资助:
国家自然科学基金项目；国家科技重大专项项目

Enhanced channel estimation algorithm for LTE uplink SC-FDMA systems with multi-user

Received:2010-12-21 Revised:2011-07-07 Online:2011-12-28 Published:2011-10-18
Contact: Li-Hua YANG E-mail:yanglihua@mail.xidian.edu.cn
Supported by:
;National Major Specialized Project of Science and Technology

摘要/Abstract

摘要：

针对LTE (Long Term Evolution,长期演进)上行多用户单载波-频分多址（SC-FDMA）系统，提出了一种增强的信道估计方法。新算法针对每个用户的导频只占有部分频带的特点和子信道的时频相关性，将最小二乘（LS）算法估计的导频子信道系数进行排序处理，并构造出了一种新的减小噪声影响（降噪）的正交变换矩阵，提出了基于该矩阵的高精度信道估计算法。计算机仿真结果表明：新算法的均方根误差（MSE）约为LS算法的十分之一。

Abstract:

An enhanced channel estimation method is proposed for the long term evolution (LTE) uplink single carrier-frequency division multiple access (SC-FDMA) systems with multi-user. Since the every user pilot symbol only hold fractional bandwidth, which leads to the length of the estimated subchannel vector of the every pilot symbol used to performing the noise reduction is too short, so the estimated channel vectors of the two pilot symbols by LS algorithm are sorted according to the time-frequency correlation at first, which aims to increasing the length of the pilot subchannel processed in the transform domain. And then an orthogonal transform matrix is constructed to reducing noise of the sorted channel in the transform domain. Based on the orthogonal transform matrix, a channel estimation algorithm with high accuracy is proposed. Simulation results show that the mean square error (MSE) of the proposed method is about one tenth of that of the LS method.

中图分类号:

TN919.72

杨丽花任光亮邱智亮. LTE上行多用户SC-FDMA系统中增强信道估计方法[J]. 北京邮电大学学报, 2011, 34(6): 86-90.

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LTE上行多用户SC-FDMA系统中增强信道估计方法

Enhanced channel estimation algorithm for LTE uplink SC-FDMA systems with multi-user

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