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Low complexity hybrid precoding algorithm for massive MIMO based on modified Newton method
- Telecommunications Science Vol. 39, Issue 11, Pages: 80-95(2023)
- 作者机构：
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DOI：10.11959/j.issn.1000-0801.2023186
CLC： TN928-
Published Online：2023-11，
Published：20 November 2023
- 稿件说明：
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Bo HU, Anding WANG, Guiyi WEI. Low complexity hybrid precoding algorithm for massive MIMO based on modified Newton method[J]. Telecommunications science, 2023, 39(11): 80-95.
Bo HU, Anding WANG, Guiyi WEI. Low complexity hybrid precoding algorithm for massive MIMO based on modified Newton method[J]. Telecommunications science, 2023, 39(11): 80-95. DOI： 10.11959/j.issn.1000-0801.2023186.
摘要
针对大规模多输入多输出（multiple-input multiple-output，MIMO）系统，提出了一种基于修正牛顿（modified Newton，MN）法的相位跟踪算法，有效地解决了传统高性能混合预编码方案中的高计算复杂度问题。该算法从子维度向量恢复的角度优化模拟预编码矩阵。在每个子维度优化中，采用相位跟踪方法将模拟预编码向量的恢复转化为无约束的非线性优化问题，并利用 MN 法进行求解。同时，应用 Gerschgorin’s Disk 定理和Hermitian矩阵分块求逆引理，分别降低了MN法中计算修正因子以及Hessian矩阵求逆的计算复杂度。实验结果表明，与仿真中几种传统的高性能混合预编码方案相比，所提算法具有更高的频谱效率和更低的计算复杂度。
Abstract
A phase tracking algorithm was proposed for massivemultiple-input multiple-output(MIMO) systems based on the modified Newton (MN) method
which effectively reduced the high computational complexity in traditional high-performance hybrid precoding schemes.The algorithm optimized the analog precoding matrix from the perspective ofsub-dimensional vector recovery.In each sub-dimension optimization
the phase tracking method was used to transform the recovery of the analog precoding vectors into an unconstrained nonlinear optimization problem
which was then solved using the MN method.Concurrently
this strategy led to a marked reduction in the computational intricacy pertaining to both the computation of correction factors and the inversion of the Hessian matrix within the framework of the MN method.This was achieved through the insightful incorporation of Gerschgorin’s Disk theorem and the Hermitian matrix block-inverse lemma.Simulation results show that the proposed algorithm has higher spectral efficiency and lower computational complexity than several conventional high-performance hybrid precoding schemes.
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