摘要: |
为了克服TD-LTE系统中传统的基于矩阵信道的迭代波束赋形方法复杂度较大且可能
不收敛的问题,提出一种基于奇异值分解的高效波束赋形方法。该方法利用系统终端侧
仅有2根天线的系统特性,采用基于2×2矩阵特征值分解公式的矩阵信道奇异值分解获得波
束赋形天线加权向量;不仅可以直接获得精确的加权向量,而且相对于传统迭代方法大幅降
低了复杂度。理论分析和仿真结果验证了所提方法的有效性。 |
关键词: TD-LTE 波束赋形 奇异值分解 信道互易性 |
DOI:10.3969/j.issn.1001-893X. |
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基金项目:国家科技重大专项资助项目(2009ZX03002-001) |
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Singular Value Decomposition Based High Efficient Beamforming Method in TD-LTE Systems |
FAN Xun,GUO Bin,CAO Wei,JIANG Zhi-ning |
(AlcatelLucent Shanghai Bell Co., Ltd., Shanghai 201206,China) |
Abstract: |
To overcome the problems of high implementation complexity and iterati
on convergence in the traditional TDLTE matrixchannelbased beamforming, th
is
paper proposes a singularvaluedecomposition(SVD)based highefficient be
amfor
ming method. The proposed method, utilizing the system characteristic of only tw
o antennas at the TDLTEsystem terminal side, adopts the highefficient 2-by
-2-
matrixeigenvaluedecompositionbased SVD to obtain beamforming antenna weigh
tin
g vector; not only the precise weighting vector can be directly obtained but a
lso the complexity is greatly reduced against the traditional one. Theoretical
analysis and simulation results confirm the validity of the propose method. |
Key words: TD-LTE beamforming singular value decomposition(SVD) channel reciprocity |