LTE上行多用户SC-FDMA系统中时变信道估计方法

doi:10.3969/j.issn.1000-436x.2014.09.009

通信学报 ›› 2014, Vol. 35 ›› Issue (9): 91-98.doi: 10.3969/j.issn.1000-436x.2014.09.009

LTE上行多用户SC-FDMA系统中时变信道估计方法

杨丽花,杨龙祥,朱洪波

南京邮电大学无线通信重点实验室，江苏南京 210003

出版日期:2014-09-25 发布日期:2017-06-14
基金资助:
国家重点基础研究发展计划(“973”计划)基金资助项目;国家自然科学基金项目资助;南京邮电大学人才引进基金项目资助;国家科技重大专项基金资助项目

Time-varying channel estimation for LTE uplink SC-FDMA system with multi-user

Li-hua YANG,Long-xiang YANG,Hong-bo ZHU

Key Lab.of Wireless Communications,Nanjing University of Posts and Telecommunications,Nanjing 210003,China

Online:2014-09-25 Published:2017-06-14
Supported by:
The National Basic Research Program of China(973 Program);The National Natural Science Foundation of China;Nanjing University of Posts ＆ Telecommunications Project;The Important National Science and Technology Specific Project

摘要/Abstract

摘要：

针对高速移动时分双工长期演进(TDD-LTE,time division duplex-long term evolution)上行单载波?频分多址（SC-FDMA,single carrier-frequency division multiple access）系统，提出了一种新型的变换域时变信道估计方法。在所定义的变换域中，基于两块导频符号的信道参数估计，提出利用基于判决导向的非线性内插方法来估计数据符号的信道参数。为了便于SC-FDMA系统均衡，推导给出了变换域信道与频域信道的转换表达式，利用该式可以直接将变换域信道参数估计转化为频域信道响应。计算机仿真结果表明，新方法的性能远远优于传统方法的估计性能，且具有低的计算复杂度。

关键词: TDD-LTESC-FDMA, 时变信道估计, 变换域, 非线性内插, 判决导向

Abstract:

A novel transform-domain based time-varying channel estimation method is proposed for the long term evolu-tion (LTE) uplink single carrier-frequency division multiple access (SC-FDMA) systems with multi-user.In the transform domain,the channel parameters of the two block pilots were firstly estimated,then the decision-directed (DD) based non-linear interpolation method was employed to estimate the channel parameters of the data symbols.To convenient equalization in the frequency domain,the transform expression of the transform-domain channel and frequency-domain channel was derived,by which the channel estimation in the frequency domain could be directly obtained.Simulation re-sults show that the performance of the proposed method is much better than those of the available methods,and the pro-posed method has a low computational complexity.

Key words: TDD-LTE SC-FDMA, time-varying channel estimation, transform domain, non-linear interpolation, deci-sion-directed

杨丽花,杨龙祥,朱洪波. LTE上行多用户SC-FDMA系统中时变信道估计方法[J]. 通信学报, 2014, 35(9): 91-98.

Li-hua YANG,Long-xiang YANG,Hong-bo ZHU. Time-varying channel estimation for LTE uplink SC-FDMA system with multi-user[J]. Journal on Communications, 2014, 35(9): 91-98.

图/表 8

图1

图2

图3

图4

表1

复杂度比较"

信道估计方法	复数乘法	复数加法
新方法	N_DlbN_D+2N_u²+36N_u	2N_DlbN_D+2N_u×(N_u+3× 2^J+1+2)
文献[2]	$N_{u} + (M + 1) \frac{N_{D}^{2}}{2} \times 1 b N_{D} + L N_{D} \times [M (13 + φ) + 2 φ]$	$(M + 1) N_{D} 1 b N_{D} + 2 L φ (N_{D} - 1) + L \times [M (N_{D} (φ + 8)) + 1]$
文献[3]	3N_DlbN_D+2N_u+2[3L²+6L+(N_D?2)×(L³+3L²+6L+1)+1]	6N_DlbN_D+2×[2L²+3L(N_D?2)×(L³+2L²+L)]

表1

图5

图6

图7

参考文献 11

[1]	3GPP,TS 36.211.Physical Channels and Modulation[S]. 2009.
[2]	KARAKAYA B , ARSLAN H . Channel estimation for LTE uplink in high Doppler spread[A]. IEEE Wireless Communications and Net-working Conf (WCNC)[C]. Las Vegas,USA, 2008.1126-1130.
[3]	HUANG S C , LIN J C , CHOU K P . Novel channel estimation tech-niques on SC-FDMA uplink transmission[A]. IEEE Vehicular Tech-nology Conference[C]. Taiwan,China, 2010.1-5.
[4]	IDREES N M , HASELMAYR W , SCHELLANDER D . Time variant channel estimation using a modified complex exponential basis expan-sion model in LTE-OFDM systems[A]. IEEE 21st International Sym-posium on Personal Indoor and Mobile Radio Communications[C]. Instanbul, 2010.603-607.
[5]	VISINTIN M . Karhunen-Loeve expansion of a fast rayleigh fading process[J]. IEEE Electronics Letters, 1996,32(8):1712-1713.
[6]	ZEMEN T , MECKLENBRAUKER C F . Time-variant channel estima-tion using discrete prolate spheroidal sequences[J]. IEEE Transactions on Signal Processing, 2005,53(9):3597-3607.
[7]	ABRISHAMKAR F , IRVINE J . Comparison of current solutions for the provision of voice services to passengers on high speed trains[A]. IEEE Vehicular Technology Conference[C]. Boston,MA, 2000.2068-2075.
[8]	GOLLER M . Application of GSM in high speed trains: measurements and simulations[J]. IEEE Colloquium on Radio Communications in Transportation, 1995,(5):1-7.
[9]	3GPP.TSG-RAN4-37 (R4-051274).Initial Ideal Simulation Results for Different High Speed Propagation Scenarios[S]. 2005.
[10]	CHEPN H . Frequency offset estimation for high speed users in E-UTRA uplink[A]. IEEE International Symposium on Personal,In-door and Mobile Radio Communications[C]. Athens,Greece, 2007.1-5.
[11]	ZHAO M , SHI Z N , REED M . Channel Estimation for Rapid Disper-sive Fading Channels[P]. US20090103666, 2009.

LTE上行多用户SC-FDMA系统中时变信道估计方法

Time-varying channel estimation for LTE uplink SC-FDMA system with multi-user

在线阅读

PDF下载

可视化

被引次数

摘要/Abstract

引用本文

使用本文

图/表 8

参考文献 11

相关文章 6

Metrics

推荐阅读 0

[1]	何纯全，窦高奇，高俊，黄高明. 基于叠加训练的非合作多用户/MIMO信道估计[J]. 通信学报, 2014, 35(7): 18-156.
[2]	何纯全,窦高奇,高俊,黄高明. 基于叠加训练的非合作多用户/MIMO信道估计[J]. 通信学报, 2014, 35(7): 151-156.
[3]	肇启明,张钦宇,张乃通. 基于多调频率CSS的混合业务传输方法[J]. 通信学报, 2011, 32(8): 8-14.
[4]	景源,殷福亮. 有色噪声下基于Wishart随机矩阵的贝叶斯时变信道估计[J]. 通信学报, 2009, 30(2): 79-84.
[5]	景源,殷福亮,曾硕. 基于粒子滤波的MIMO-OFDM时变信道半盲估计[J]. 通信学报, 2007, 28(8): 67-75.
[6]	邢渝华,樊祥宁. 宽带无线接入OFDM系统信道估计技术研究[J]. 通信学报, 2005, 26(1A): 209-212.