MIMO-OFDM中基于波束成形的天线选择研究  

Antenna Selection Based on Beamforming in MIMO-OFDM System

作　　者：李韶华[1] 王有政[1] 周祖成[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《微计算机信息》2007年第02X期99-101,共3页Control & Automation

基　　金：国家"八六三"高技术项目(2002AA1Z1380)

摘　　要：为减少多输入多输出(MIMO)正交频分复用(OFDM)系统的复杂度,本文基于最小化差错概率准则,提出一种波束成形的天线选择算法。该算法不仅可以减少收发两端DFT/IDFT的个数,而且有效减少射频模块的个数,从而大大降低系统的复杂度。为降低天线选择算法本身的复杂度,文中提出一种简化的天线选择算法。仿真结果表明,与时频联合波束成形算法相比,相同性能要求下,其需要的射频模块的个数可减少37.5%以上。In order to reduce the complexity of MIMO （Multiple-Input and Multiple-Output） OFDM （Orthogonal Frequency Division Multiplexing） systems, an antenna selection algorithm is proposed based on beamforming with error probability minimization criteria. Using the proposed algorithm, both the number of DFT/IDFT （Discrete Fourier Transform/Inverse DFT） blocks and RF （Radio Frequency） chains can be reduced, which result in great system complexity reduction. To further reduce the complexity of the selection algorithm, a simplified scheme is also proposed. Simulation results show that, to achieve the same performance, the number of RF chains can be reduced by more than 37.5% in comparison with joint time-frequency beamforming algorithm.

关 键 词：多输入多输出(MIMO) 正交频分复用(OFDM) 波束成形 天线选择 

分 类 号：TN911.5[电子电信—通信与信息系统]