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

Journal on Communications ›› 2014, Vol. 35 ›› Issue (9): 91-98.doi: 10.3969/j.issn.1000-436x.2014.09.009

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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

Abstract

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

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.

Figures/Tables 8

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)]

References 11

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