[1]梁 彦,宋荣方,李 飞,等.同相正交不平衡影响下的TDD MIMO-OFDM信道互易性补偿[J].南京理工大学学报(自然科学版),2017,41(06):765.[doi:10.14177/j.cnki.32-1397n.2017.41.06.016]
 Liang Yan,Song Rongfang,Li Fei,et al.Compensation of channel non-reciprocity for TDD MIMO-OFDMsystem with IQ imbalance[J].Journal of Nanjing University of Science and Technology,2017,41(06):765.[doi:10.14177/j.cnki.32-1397n.2017.41.06.016]
点击复制

同相正交不平衡影响下的TDD MIMO-OFDM信道互易性补偿()
分享到:

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
41卷
期数:
2017年06期
页码:
765
栏目:
出版日期:
2017-12-31

文章信息/Info

Title:
Compensation of channel non-reciprocity for TDD MIMO-OFDMsystem with IQ imbalance
文章编号:
1005-9830(2017)06-0765-04
作者:
梁 彦宋荣方李 飞季 薇
南京邮电大学 通信与信息工程学院,江苏 南京 210003
Author(s):
Liang YanSong RongfangLi FeiJi Wei
College of Telecommunications and Information Engineering,Nanjing University of Posts andTelecommunications,Nanjing 210003,China
关键词:
同相与正交支路不平衡 时分双工 多输入多输出 正交频分复用 信道互易性补偿 高斯消元法 补偿矩阵
Keywords:
in-phase and quadrature-phase imbalance time-division duplex multiple input multiple output orthogonal frequency-division multiplexing channel non-reciprocity compensation Gaussian elimination method compensation matrix
分类号:
TN929.5
DOI:
10.14177/j.cnki.32-1397n.2017.41.06.016
摘要:
为了弥补同相与正交(IQ)支路不平衡造成的时分双工(TDD)系统信道互易性损失,研究了接收机IQ不平衡影响下的TDD多输入多输出正交频分复用(MIMO-OFDM)系统的信道互易性补偿问题。通过建立时域信道互易性补偿模型,提出了基于补偿矩阵的信道互易性补偿方法。通过设计导频符号并采用高斯消元法,提出了基于导频辅助的补偿矩阵估计方法。仿真结果表明,该方法能够有效地补偿TDD MIMO-OFDM系统的信道互易性,所获得的系统性能与具有理想IQ支路的系统相近。
Abstract:
The compensation of channel non-reciprocity for time-division duplex(TDD)multiple input multiple output orthogonal frequency-division multiplexing(MIMO-OFDM)system with receiver in-phase and quadrature-phase(IQ)imbalance is investigated to mitigate the loss of non-reciprocity channel.A channel compensation scheme based on a compensation matrix is proposed by building a time-domain channel non-reciprocity compensation model.An estimation scheme of the compensation matrix aided by pilots is proposed by designing the pilot symbols and utilizing Gaussian elimination method.Simulation results show that,this scheme can compensate the channel non-reciprocity of the TDD MIMO-OFDM system effectively,and the system performance is similar to the system with ideal IQ branches.

参考文献/References:

[1] Tarighat A,Bagheri R,Sayed A H.Compensation schemes and performance analysis of IQ imbalances in OFDM receivers[J].IEEE Trans Signal Processing,2005,53(8):3257-3268.
[2]Shu Feng,Wang Jin,Li Jun,et al.Pilot optimization,channel estimation and optimal detection for full-duplex OFDM systems with IQ-imbalances[J].IEEE Transactions on Vehicular Technology,2017,66(8):6993-7009.
[3]Yu Hai,Shu Feng,You You,et al.Compressed sensing-based time-domain channel estimator for full-duplex OFDM systems with IQ-imbalances[J].Science China Information Sciences,2017,60(8):0823031-08230313.
[4]Boccardi F,Heath R W,Lozano A,et al.No downlink pilots are needed in TDD massive MIMO[J].IEEE Trans Wireless Communications,2017,16(5):2921-2935.
[5]孙德春,张菲菲,刘祖军,等.TDD-MIMO系统中由I/Q不平衡引起的信道非互易性补偿方法[J].通信学报,2011,32(3):79-85.
Sun Dechun,Zhang Feifei,Liu Zujin,et al.Compensation for channel non-reciprocity caused by I/Q imbalance in TDD-MIMO systems[J].Journal on Communications,2011,32(3):79-85.
[6]Liu Zujun,Sun Dechun,Wang Jieling,et al.Impact and compensation of I/Q imbalance on channel reciprocity of time-division-duplexing multiple-input multiple-output systems[J].IET Communications,2013,7(7):663-672.
[7]Petermann M,Stefer M,Ludwig F,et al.Multi-user pre-processing in multi-antenna OFDM TDD systems with non-reciprocal transceivers[J].IEEE Trans Communications,2013,61(9):3781-3793.
[8]Kolomvakis N,Coldrey M,Eriksson T,et al.Massive MIMO systems with IQ imbalance:Channel estimation and sum rate limits[J].IEEE Trans Communications,2017,65(6):2382-2396.
[9]梁彦,束锋,史夏洁.正交频分复用系统发射机接收机同相/正交不平衡补偿算法[J].南京理工大学学报,2012,36(3):465-469.
Liang Yan,Shu Feng,Shi Xiajie.Tx/Rx IQ imbalance compensation scheme for OFDM systems[J].Journal of Nanjing University of Science and Technology,2012,36(3):465-469.
[10]Liang Yan,Shu Feng,Zhang Yijin,et al.High-performance compensation scheme for frequency-dependent IQ imbalances in OFDM transmitter and receiver[J].Journal of Systems Engineering and Electronics,2013,24(2):204-208.
[11]ETSI TR 125 943-2002,Universal mobile telecommun-ications system(UMTS)[S].

备注/Memo

备注/Memo:
收稿日期:2017-10-23 修回日期:2017-11-01
基金项目:国家自然科学基金(61501254; 61471200; 61603197); 中国博士后科学基金(2014M561692); 江苏省博士后科研资助计划(1402087C); 南京邮电大学引进人才科研启动基金(NY213063)
作者简介:梁彦(1979-),女,博士,讲师,主要研究方向:宽带无线通信系统与通信信号处理,E-mail:liangyan@njupt.edu.cn。
引文格式:梁彦,宋荣方,李飞,等.同相正交不平衡影响下的TDD MIMO-OFDM信道互易性补偿[J].南京理工大学学报,2017,41(6):765-768.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2017-12-31