作　　者： ; ; ; ;

机构地区： 北京邮电大学信息与通信工程学院无线新技术研究所

出　　处： 《北京邮电大学学报》 2008年第6期42-45,共4页

摘　　要： 为降低多输入多输出正交频分复用(MIMO-OFDM)系统选取波束成形向量的计算复杂度和反馈量,提出一种基于非线性插值的波束成形方法,即在参考位置子载波的波束成形向量内插出非参考位置子载波的波束成形向量.分析和仿真结果表明,在较小码书的情况下,该方法的性能优于基于量化的最优波束成形方法,并且反馈量和计算复杂度也显著降低;而与基于线性插值和测地线插值的波束成形方法相比,该方法在同样的反馈量下具有更好的性能. In order to reduce computational complexity of selecting beamforming vectors and feedback in multiple input multiple output orthogonal frequency division multiplexing （MIMO-OFDM） systems, a nonlinear interpolation based beamforming scheme is proposed, the principle of which is to interpolate beamforming vectors of the non-pilot subcarriers via that of the pilot subcarriers. Analysis and simulation results illustrate that the proposed scheme outperforms the optimal beamforming with quantization as well as significant feedback and computational complexity reduction in the case of small size of codebook, while provides better performance than the existing linear interpolation and geodesic interpolation based beamforming methods with the same feedback.

关 键 词： 波束成形 有限反馈 多输入多输出 非线性插值 正交频分复用

领　　域： [电子电信] [电子电信]