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。
To overcome the problems of high implementation complexity and iteration convergence in the tradi- tional TD-LTE matrix-channel-based beamforming, this paper proposes a singular-value-decomposition （SVD）- based high-efficient beamforming method. The proposed method, utilizing the system characteristic of only two antennas at the TD-LTE-system terminal side, adopts the high-efficient 2 - by - 2 - matrix-eigenvalue-deeompo- sition-based SVD to obtain beamforming antenna weighting vector; not only the precise weighting vector can be directly obtained but also the complexity is greatly reduced against the traditional one. Theoretical analysis and simulation results confirm the validity of the propose method.
出处
《电讯技术》
北大核心
2010年第8期46-51,共6页
Telecommunication Engineering
基金
国家科技重大专项项目(2009ZX03002-001)~~
关键词
TD—LTE
波束赋形
奇异值分解
信道互易性
TD - LTE
beamforming
singular value decomposition （SVD）
channel reciprocity
