应用于LTE上行链路的D-MMSE-FE 均衡算法

›› 2015, Vol. 28 ›› Issue (8): 63-.

应用于LTE上行链路的D-MMSE-FE 均衡算法

王连友

(电信科学技术研究院无线移动通信国家重点实验室,北京 100192)

出版日期:2015-08-15 发布日期:2015-08-15
作者简介:王连友(1984—),男,硕士,工程师。研究方向:智能信息与语音信号处理。E-mail:jlyzsh@163.com

D_MMSE-FE Equalization Algorithm for LTE Up Link System

WANG Lianyou

(State Key Laboratory of Mobile Communications,China Academy of Telecommunications Technology,Beijing 100192,China)

Online:2015-08-15 Published:2015-08-15

摘要/Abstract

摘要：

为克服线性均衡性能的局限性及避免传统判决反馈均衡器的高复杂度,提出了一种判决反馈均衡算法D-MMSE-FE。该均衡器先是分析线性MMSE均衡的结果成分,并根据最小均方误差准则计算出均衡器的前、后向传递函数,形成反馈链路,提高均衡器性能。将该种均衡器应用于TDD-LTE 1×2 SIMO上行链路中,在协议中常用的信道下进行了计算机仿真,仿真结果表明,TDD-LTE 1×2 SIMO均衡器相对于线性均衡器使系统性最多可提高达2 dB。

关键词: 频域均衡, 判决反馈, 长期演进, 最小均方误差准则

Abstract:

A new decision feedback equalizer algorithm which is called Double MMSE Feedback Equalizer and D-MMSE-FE for short was presented to improve the ability of linear equalizer and avoid the high complexity of the traditional decision feedback equalizer.The new algorithm analyses the result of linear MMSE equalizer first and obtains the front and back transfer functions according to the minimum mean square error criterion.A link circuit is employed to improve the ability of equalizer.The new Equalizer is put into use in the TDD LTE uplink SIMO 1×2 receiver as an example,and simulated in the common channels in 3GPP protocol.The results show that the new equalizer improves equalization performance by up to 2 dB compared with the linear equalizer.

Key words: frequency domain equalization;decision feedback;long term evolution;minimum mean square error criterion

中图分类号:

TN911.5

王连友. 应用于LTE上行链路的D-MMSE-FE 均衡算法[J]. , 2015, 28(8): 63-.

WANG Lianyou. D_MMSE-FE Equalization Algorithm for LTE Up Link System[J]. , 2015, 28(8): 63-.