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OFDM/OQAM系统自适应波形设计及多址接入系统 被引量：6

Adaptive Pulse Shaping Filter and Multiple Access Technology for OFDM/OQAM System
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摘要 基于传统正交频分复用技术的OFDMA多址接入技术仍然存在循环前缀-正交频分复用(CP-OFDM)技术的固有缺陷,即循环前缀的添加降低了系统频谱利用率,多普勒频移对传统OFDMA系统产生较强的子载波间干扰,且对相邻频带的其他无线传输系统引入较强的相邻信道干扰。该文主要讨论基于扩展高斯函数的正交频分复用系统自适应波形设计,通过信道散射函数选择合适的扩展因子参数,获取更高的频谱利用率和抑制符号间干扰和子载波间干扰。最后该文将自适应波形设计的思想扩展至基于扩展高斯函数的多址接入系统,使每个用户能够根据信道条件选择合适的成形滤波器函数,进而使多址接入系统达到全局最优化。仿真结果验证了该文方法的有效性。 The traditional CP-OFDM based multiple access technology still has two drawbacks,i.e.,adding cyclic prefix reduces the spectrum efficiency and it is sensitive to the Doppler frequency shift.In this paper,the time-frequency localization of the Extended Gauss Function（EGF） based OFDM/OQAM system is investigated.Consequently,an adaptation scheme in the downlink OFDMA/OQAM system is proposed where the transmitter can choose reasonable spreading factor to match the channel propagation against the inter-symbol interference and inter-carrier interference.Finally,the adaptive scheme is extended to the OFDM/OQAM-based multiple access technology to optimize the system performance.Simulation results prove the effectiveness of the proposed method.
作者 胡苏 武刚 李少谦
机构地区 电子科技大学通信抗干扰国家级重点实验室
出处 《电子与信息学报》 EI CSCD 北大核心 2012年第5期1214-1219,共6页 Journal of Electronics & Information Technology
基金 科技部中国芬兰国际合作项目(2010DFB10410) 国家自然科学基金(61101090 61032002) 中央高校基金(ZYGX2010X003)资助课题
关键词 正交频分复用 多址接入系统 成形滤波器函数 时频聚焦 Orthogonal Frequency Division Multiplex（OFDM） Multiple access Pulse shaping filter Timefrequency localization
分类号 TN929.5 [电子电信—通信与信息系统]
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参考文献12

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同被引文献24

  • 1Saeedi-Sourck H,Wu Y, Bergmans J W M. Sensitivity analysisof offset QAM multicarrier systems to residual carrier frequencyand timing offsets[J]. Signal Processing , 2011,91: 1604 - 1612.
  • 2Fusco T, Petrella A, Tanda M. Joint symbol timing and CFO esti-mation for OFDM/OQAM systems in multipath channels[J], EUR-ASIP Journal on Advances in Signal Processing, 2010:1 - 11.
  • 3Fusco T,Petrella A,Tanda M. Data-aided symbol timing and CFOsynchronization for filter-bank multicarrier systems[J]. IEEE Trans .on Wireless Communications,2009, 8(5) : 2705 - 2715.
  • 4Thein C,Schellmann M, Peissig J. Analysis of frequency do-main frame detection and synchronization in OQAM-OFDM sys-tems[J]. EURASIP Journal on Advances in Signal Processing2014’ 2014: 83.
  • 5Bolcskei H. Blind estimation of symbol timing and carrier fre-quency offset in wireless OFDM systems [J]. IEEE Trans, onCommunications,2001, 49(6) : 988 - 999.
  • 6Ciblat P, Serpedin E. A fine blind frequency offset estimator forOFDM/OQAM systems[J], IEEE Trans, on Signal Processing,2004,52(1): 291 - 296.
  • 7Lin G,Lundheim L* Hoke N. New methods for blind fine estima-tion of carrier frequency offset in OFDM/OQAM systems [C] //Proc. of the Signal Processing Advance in Wireless Communi-cations ,2006 : 1-5.
  • 8Fusco T,Petrella A,Tanda M. Non-data-aided carrier fre-quency offset estimation for pulse shaping OFDM/OQAM sys-tems[J]. Signal Processing . 2008,88: 1958 - 1970.
  • 9Siohan P,Siclet C,Lacaille N. Analysis and design of OFDM/OQAM systems based on filterbank theory[J]. IEEE Trans, onSignal Processing. 2002,50(5) : 1170 - 1183.
  • 10Farhang- Borouj eny B. OFDM versus filter bank multicarrier [J].IEEE Signal Processing Magazine,2011,28(3) : 92 - 112.

引证文献6

二级引证文献27

电子与信息学报
2012年 第5期

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