高移动环境下利用无线信号空域特征实现OFDM系统的ICI消除

doi:10.11959/j.issn.1000-436x.2015202

通信学报 ›› 2015, Vol. 36 ›› Issue (8): 76-82.doi: 10.11959/j.issn.1000-436x.2015202

高移动环境下利用无线信号空域特征实现OFDM系统的ICI消除

王薇,殷勤业,穆鹏程

西安交通大学电子与信息工程学院，陕西西安 710049

出版日期:2015-08-25 发布日期:2015-08-25
基金资助:
国家自然科学基金资助项目

Inter-carrier interference cancellation using spatial characteristics for high-mobility OFDM communication systems

Wei WANG,Qin-ye YIN,Peng-cheng MU

School of Electronics and Information Engineering,Xi’an Jiaotong University,Xi’an 710049,China

Online:2015-08-25 Published:2015-08-25
Supported by:
The National Natural Science Foundation of China

摘要/Abstract

摘要：

高移动性正交频分复用(OFDM)系统受多普勒扩展影响产生严重的子载波间干扰(ICI)。根据实际场景中无线信号的空域传播特征，采用 WINNERⅡ信道模型建模无线信道，提出利用阵列天线作为接收天线从空域角度消除 ICI。该方法利用波达方向估计和波束形成网络对接收信号进行分离，并对分离后的各路信号分别做多普勒频偏补偿，最后将各路处理后的信号进行最大比合并获得多波束分集增益。仿真结果表明，所提方法可有效减小ICI和误码率平台，较处理前可获得5～7 dB的信干比增益。

关键词: 载波间干扰消除, 正交频分复用系统, 高移动性, 阵列信号处理

Abstract:

High-mobility orthogonal frequency division multiplexing(OFDM)systems suffered severe inter-carrier interference(ICI)from Doppler spreading.On the basis of the characteristics of wireless propagation in practical scenarios,a method which employed the WINNER Ⅱ channel model to represent the practical wireless channel and an antenna array as the receiver to eliminate ICI in space-domain was proposed.The direction of arrival estimation algorithm and the beamforming network were used to separate the received signals in space-domain.Multi-beam diversity gain was obtained finally by means of combining the signals which have been compensated for Doppler frequency shifts(DFS)respectively.Simulation results demonstrate that the proposed method not only effectively reduces ICI and the error floors,but also obtains a 5～7 dB signal-to-interference gain over systems without use of the proposed method.

Key words: ICI cancellation, OFDM system, high mobility, array signal processing

王薇,殷勤业,穆鹏程. 高移动环境下利用无线信号空域特征实现OFDM系统的ICI消除[J]. 通信学报, 2015, 36(8): 76-82.

Wei WANG,Qin-ye YIN,Peng-cheng MU. Inter-carrier interference cancellation using spatial characteristics for high-mobility OFDM communication systems[J]. Journal on Communications, 2015, 36(8): 76-82.

图/表 7

图1

图2

图3

图4

图5

图6

图7

参考文献 13

[1]	MA J , ORLIK P , ZHANG J Y , LI Y . Statistics-based ICI mitigation in OFDM over high-mobility channels with line-of-sight components[J]. IEEE Trans on Wireless Communications, 2011,10(11): 3577-3582.
[2]	CHEN S P , YAO T R . Intercarrier interference suppression and channel estimation for OFDM systems in time-varying frequency-selective fading channels[J]. IEEE Trans on Consumer Electronics, 2004,50(2): 429-435.
[3]	RUAN L , ZHANG J H , ZHANG Y Y ,et al. Channel estimation and ICI cancellation for OFDM in doubly-selective channels[A]. The IEEE 68th Vehicular Technology Conference VTC 2008- Fall[C]. 2008. 1-5.
[4]	HIRONORI O , HIROSHI Y . Rotating a circular array antenna to improve performance of OFDM receivers[A]. Proceeding of IEEE ICSPCS[C]. 2011. 1-4.
[5]	DAISUKE M , KENJI K , HIROSHI Y . Frequency offset compensation for OFDM receiver using rotating concyclic antenna[A]. Proceeding of IEEE ISCAS[C]. 2008. 2478-2481.
[6]	WINNER WP1.IST-4-027756 WINNER Ⅱ Channel Models[S]. Helsinki:Wireless World Initiative, 2007.
[7]	熊磊, 钟章队, 艾渤 . 高速铁路移动通信系统WINNER信道性能分析[J]. 铁道学报, 2012,34(3): 44-49. XIONG L , ZHONG Z D , AI B . Analysis on performance of WINNER channels of mobile communication system of high-speed railway[J]. Journal of the China Railway Society, 2012,34(3): 44-49.
[8]	GOLDSMITH A . Wireless Communication[M]. Cambridge University Press, 2004.
[9]	WANG H M . On Time-Frequency Synchronization for Next Generation Wireless Communication Systems[D]. Xi’an:Xi’an Jiaotong University, 2010.
[10]	鄢社峰, 马远良 . 传感器阵列波束优化设计及应用[M]. 北京: 科学出版社, 2009. YAN S F , MA Y L . Sensor Array Beampattern Optimization:Theory with Application[M]. Beijing: Science Press, 2009.
[11]	EDFORDS O , SANDEL M ,et al. Analysis of DFT-based channel estimators for OFDM[J]. Wireless Personal Communications, 2000,12(1): 55-70.
[12]	JIA L , CAO D , HOU C . Two novel transform domain estimation methods for OFDM system and their application environment[A]. IEEE CCECE[C]. 2004. 337-380.
[13]	ABOUTORAB N , HARDUAWANA W , VUCEITIC B . Channel estimation and ICI cancellation for high mobility pilot-aided MIMO-OFDM systems[A]. IEEE WCNC[C]. 2013. 3110-3115.

高移动环境下利用无线信号空域特征实现OFDM系统的ICI消除

Inter-carrier interference cancellation using spatial characteristics for high-mobility OFDM communication systems

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 7

参考文献 13

相关文章 9

Metrics

推荐阅读 0

[1]	周锋, 张宝胜, 张文博. 基于水声扩频信号的空时分簇DoA估计算法[J]. 通信学报, 2022, 43(8): 100-108.
[2]	梅锴, 赵海涛, 刘潇然, 刘军, 熊俊, 任保全, 魏急波. 高效的基于数据与模型的信道估计算法[J]. 通信学报, 2022, 43(1): 59-70.
[3]	王薇,张明,姚博彬,殷勤业,穆鹏程. 结合子空间旋转技术的非圆信号快速DOA估计[J]. 通信学报, 2020, 41(11): 198-205.
[4]	吕望晗,王华力,牟善祥,刘峰. 空时互质采样下栅格失配目标的频率和DOA联合估计[J]. 通信学报, 2017, 38(2): 125-131.
[5]	倪淑燕,程乃平,倪正中. 固定样本数目的QR分解递推算法[J]. 通信学报, 2010, 31(8A): 195-200.
[6]	程乃平,倪淑燕. 改进的特征空间波束形成算法[J]. 通信学报, 2010, 31(8A): 32-36.
[7]	孙晓颖,陈建,林琳. 基于时空处理的频率与二维DOA联合估计算法[J]. 通信学报, 2009, 30(8): 39-44.
[8]	刘剑,王延伟,黄知涛,周一宇. 共轭传播算子测向算法[J]. 通信学报, 2008, 29(5): 13-18.
[9]	顾建峰,魏平. 基于伪协方差矩阵的频率和角度联合估计算法[J]. 通信学报, 2007, 28(8): 40-45.