东南大学学报（自然科学版）2011，Vol.41Issue(5)：897-902,6.DOI:10.3969/j.issn.1001-0505.2011.05.001
基于波束成形的MIMO-OFDM插值算法
Interpolation algorithms based on beamforming for MIMO-OFDM
摘要
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.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Key words
multiple input multiple output/ orthogonal frequency division multiplexing/ beamforming/ limited feedback/ interpolation algorithm分类
信息技术与安全科学引用本文复制引用
何春龙,尤肖虎,朱鹏程,盛彬..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):897-902,6.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). （60902013）
