[1]何春龙,尤肖虎,朱鹏程,等.基于波束成形的MIMO-OFDM插值算法[J].东南大学学报(自然科学版),2011,41(5):897-902.[doi:10.3969/j.issn.1001-0505.2011.05.001]
 He Chunlong,You Xiaohu,Zhu Pengcheng,et al.Interpolation algorithms based on beamforming for MIMO-OFDM[J].Journal of Southeast University (Natural Science Edition),2011,41(5):897-902.[doi:10.3969/j.issn.1001-0505.2011.05.001]
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基于波束成形的MIMO-OFDM插值算法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
41
期数:
2011年第5期
页码:
897-902
栏目:
信息与通信工程
出版日期:
2011-09-20

文章信息/Info

Title:
Interpolation algorithms based on beamforming for MIMO-OFDM
作者:
何春龙尤肖虎朱鹏程盛彬
(东南大学移动通信国家重点实验室, 南京 210096)
Author(s):
He ChunlongYou XiaohuZhu PengchengSheng Bin
(National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China)
关键词:
多输入多输出正交频分复用波束成形有限反馈插值算法
Keywords:
multiple input multiple output orthogonal frequency division multiplexing beamforming limited feedback interpolation algorithm
分类号:
TN911
DOI:
10.3969/j.issn.1001-0505.2011.05.001
摘要:
针对MIMO-OFDM系统中波束成形线性球状插值算法复杂度过大并且只适用于非量化波束成形的情形,提出了一种通用的插值算法.该算法通过在导频子载波上反馈波束成形向量,同时利用信道频域相关性,内插重构非导频子载波上的波束成形向量,极大地降低了每个子载波在波束成形时的反馈开销.同时,考虑到实际系统的可实现性,在通用插值算法基础上提出了一种相位量化方法.仿真结果表明,提出的通用插值算法不仅适用于非量化波束成形,而且也适用于量化波束成形.另外,提出的相位量化方法的误比特率(BER)性能优于现有的波束成形插值算法,并且易于实际系统实现.
Abstract:
The linear spherical interpolation algorithm based on beamforming for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems has large complexity and it can only be applied to unquantized beamforming. Therefore, a general spherical interpolation method is proposed. This method feeds back pilot subcarrier beamforming vectors to the transmitter; then using the channel correlation in the frequency domain, the beamforming vectors for non-pilot subcarriers are reconstructed according to that of the two neighboring pilot subcarriers using the general spherical interpolation algorithm. So the general spherical interpolation method can decrease the feedback overhead caused by the beamforming vectors on every subcarrier. Furthermore, considering the realization of the actual system, a phase quantization method is proposed. Simulation results show that the general spherical interpolation algorithm is applicable for both unquantized beamforming and quantized beamforming. And the bit error rate (BER) performance of the phase quantization method outperforms existing MIMO-OFDM beamforming interpolation algorithms, and is easy to realize in actual systems.

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备注/Memo

备注/Memo:
作者简介:何春龙(1984—),男,博士生;尤肖虎(联系人),男,博士,教授,博士生导师,xhyu@seu.edu.cn.
基金项目:国家自然科学基金资助项目(60902013)、国家科技重大专项资助项目(2009ZX03003-006-03)、都科摩(北京)通信技术研究中心有限公司资助项目、国家教育部博士点基金资助项目(20100092120015)、江苏省自然科学基金资助项目(BK2010376)、江苏省普通高校研究生科研创新计划资助项目(CXZZ_0153)、东南大学移动通信国家重点实验室开放课题资助项目(N200902).
引文格式: 何春龙,尤肖虎,朱鹏程,等.基于波束成形的MIMO-OFDM插值算法[J].东南大学学报:自然科学版,2011,41(5):897-902.[doi:10.3969/j.issn.1001-0505.2011.05.001]
更新日期/Last Update: 2011-09-20