面向5G应用的OQAM-OFDM调制：原理、技术和挑战

doi:10.11959/j.issn.1000-0801.2016157

摘要/Abstract

摘要：

OFDM因其本身存在的技术缺陷，已经很难满足未来5G支持更多通信设备连接和多样化通信场景的需求。作为OFDM技术的一种替代方案，OQAM-OFDM技术采用了具有良好频域聚焦特性的原型滤波器，为其在5G中的应用提供了广阔的前景。首先简要介绍OQAM-OFDM系统的基本原理和特性，在此基础上，进一步分析其在5G应用中的优势，最后阐述了OQAM-OFDM应用在5G中的关键技术问题，包括拖尾抑制等。

关键词: 5G, OQAM-OFDM, OFDM, 原型滤波器, 拖尾抑制

Abstract:

5G will need to be able to support much larger connections of communication devices and meet the requirements of diverse scenarios.However，this requirement cannot be met by OFDM（orthogonal frequency division multiplexing）due to its own drawbacks.As an alternative approach to OFDM，OQAM-OFDM （offset quadrature amplitude modulation based orthogonal frequency division multiplexing）adopts a prototype filter that is well localized in frequency domain，which makes OQAM-OFDM quite suitable for 5G.The OQAM-OFDM system was briefly introduced，then，its superiority employed in 5G was deeply discussed.Finally，some key technical issues of OQAM-OFDM for application in 5G were summarized，such as tail shortening.

Key words: 5G, OQAM-OFDM, OFDM, prototype filter, tail shortening

李俊,田苑,邱玉,陈达,江涛. 面向5G应用的OQAM-OFDM调制：原理、技术和挑战[J]. 电信科学, 2016, 32(6): 15-19.

Jun LI,Yuan TIAN,Yu QIU,Da CHEN,Tao JIANG. Principles，technologies and challenges of OQAM-OFDM for 5G applications[J]. Telecommunications Science, 2016, 32(6): 15-19.

图/表 3

参考文献 17

[1]	方箭，李景春，黄标，等. 5G频谱研究现状及展望[J]. 电信科学， 2015，31（12）：2015329. FANG J ， LI J C ， HUANG B ，et al. Review and prospect on the research of 5G spectrum[J]. Telecommunications Science， 2015，31（12）：2015329.
[2]	ANDREWS J G ， BUZZI S ， CHOI W ，et al. What will 5G be[J]. IEEE Journal on Selected Areas in Communications， 2014，32（6）： 1065-1082.
[3]	王志强 . OFDM 信号旁瓣抑制新技术[D]. 武汉：华中科技大学， 2009. WANG Z Q . A novel algorithm for sidelobe suppression based on OFDM signals[D]. Wuhan：Huazhong University of Science and Technology， 2009.
[4]	BANELLI P ， BUZZI S ， COLAVOLPE G ，et al. Modulation formats and waveforms for 5G networks：who will be the heir of OFDM：an overview of alternative modulation schemes for improved spectral efficiency[J]. IEEE Signal Processing Magazine， 2014，31（6）： 80-93.
[5]	芦世先 . 降低FBMC-OQAM信号峰均功率比的无失真方法[D]. 武汉：华中科技大学， 2013. LU S X . Non-signal distortion methods for the PAPR reduction of the FBMC-OQAM signals[D]. Wuhan：Huazhong University of Science and Technology， 2013.
[6]	FARHANG-BOROUJENY B . OFDM versus filter bank multicarrier[J]. IEEE Signal Processing Magazine， 2011，28（3）： 92-112.
[7]	陈达 . OQAM-OFDM无线通信系统关键技术研究[D]. 武汉：华中科技大学， 2015. CHEN D . Research on key technologies in OQAM-OFDM communication systems[D]. Wuhan：Huazhong University of Science and Technology， 2015.
[8]	5GNOW Project. 5th generation non-orthogonal waveforms for asynchronous signaling[R/OL].[2015-03-02]. .
[9]	METIS Project. Mobile and wireless communications enablers for the 2020 information society[R/OL].（2015-05-11） [2015-12-10]. .
[10]	陈晓贝，魏克军 . 全球5G 研究动态和标准进展[J]. 电信科学， 2015，31（5）：2015120. CHEN X B ， WEI K J . Global research and standardization progress of 5G[J]. Telecommunications Science， 2015，31（5）：2015120.
[11]	SAHIN A ， GUVENC I ， ARSLAN H . A survey on multicarrier communications： prototype filters，lattice structures，and implementation aspects[J]. IEEE Communications Surveys ＆Tutorials， 2013，16（3）： 1312-1338.
[12]	CHEN D ， QU D M ， JIANG T ，et al. Prototype filter optimization to minimize stopband energy with NPR constraint for filter bank multicarrier modulation systems[J]. IEEE Transactions on Signal Processing， 2013，61（1）： 159-169.
[13]	BELLANGER M . Efficiency of filter bank multicarrier techniques in burst radio transmission[C]// IEEE Global Telecommunications Conference，December 6-10，2010，Miami，USA. New Jersey： IEEE Press， 2010： 1-4.
[14]	WANG F ， QU D M ， JIANG T ，et al. Tail shortening by virtual symbols in FBMC-OQAM signals[C]// IEEE Signal Processing and Signal Processing Education Workshop 2015，August 9-12，2015，Salt Lake City，Utah，USA. New Jersey： IEEE Press， 2015： 157-161.
[15]	CUI W J ， QU D M ， JIANG T ，et al. Coded auxiliary pilots for channel estimation in FBMC-OQAM systems[J]. IEEE Transactions on Vehicular Technology， 2015（1）： 91-99.
[16]	DORE J B ， BERG V ， KTENAS D . Channel estimation techniques for 5G cellular networks：FBMC and multiuser asynchronous fragmented spectrum scenario[J]. IEEE Transactions on Emerging Telecommunications Technologies， 2015，26（1）： 15-30.
[17]	FARHANG A ， MARCHETTI N ， DOYLE L E . Filter bank multicarrier for massive MIMO[C]// IEEE Vehicular Technology Conference，September 14-17，2014，Vancouver，Canada. New Jersey： IEEE Press， 2014： 1-7.