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TD-LTE系统中基于奇异值分解的高效波束赋形方法
樊迅,郭彬,曹伟,蒋智宁
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(上海贝尔股份有限公司，上海 201206)

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.

基金项目:国家科技重大专项资助项目(2009ZX03002-001)

Singular Value Decomposition Based High Efficient Beamforming Method in TD-LTE Systems

FAN Xun,GUO Bin,CAO Wei,JIANG Zhi-ning

(AlcatelLucent Shanghai Bell Co., Ltd., Shanghai 201206，China)

Abstract:

To overcome the problems of high implementation complexity and iterati on convergence in the traditional TDLTE matrixchannelbased beamforming, th is paper proposes a singularvaluedecomposition(SVD)based highefficient be amfor ming method. The proposed method, utilizing the system characteristic of only tw o antennas at the TDLTEsystem terminal side, adopts the highefficient 2-by -2- matrixeigenvaluedecompositionbased 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