| 大规模MIMO系统中基于牛顿迭代和超松弛迭代的WWSE预编码算法 |
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| 引用本文： | 孙文胜,许俊杰.大规模MIMO系统中基于牛顿迭代和超松弛迭代的WWSE预编码算法[J].电信科学,2019,35(11):51-57. |
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| 作者姓名： | 孙文胜 许俊杰 |
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| 作者单位： | 杭州电子科技大学通信工程学院,浙江杭州,310018 |
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| 摘 要： | 在大规模 MIMO 系统中，将牛顿迭代法用于传统的 WWSE 预编码算法求逆运算，但是其迭代初始值计算复杂。针对这一问题，提出WWSESOR-NT算法。在SOR算法的基础上提出中间算法，然后与牛顿迭代算法相结合，利用中间算法直接对高阶矩阵的逆进行估算，将得到的结果作为牛顿迭代法的迭代初始值以加快收敛速度。仿真结果显示，与传统牛顿迭代法比较，WWSESOR-NT 算法能够以更少的迭代次数和近似相同的复杂度逼近WWSE算法的性能。
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| 关 键 词： | 大规模MIMO 最小均方误差预编码 超松弛迭代 牛顿迭代 |
Newton iteration and SOR iteration based WWSE precoding algorithm in massive MIMO systems |
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| Wensheng SUN,Junjie XU.Newton iteration and SOR iteration based WWSE precoding algorithm in massive MIMO systems[J].Telecommunications Science,2019,35(11):51-57. |
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| Authors: | Wensheng SUN Junjie XU |
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| Affiliation: | Telecommunication Engineering School,Hangzhou Dianzi University,Hangzhou 310018,China |
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| Abstract: | In massive MIMO system,Newton iteration algorithm was applied to the traditional minimum mean-square error (WWSE) precoding algorithm to calculate the inverse operation,but the initial value of iteration was complicated.Aiming at this problem,WWSESOR-NT algorithm was proposed.The intermediate algorithm based on the SOR iterative algorithm was proposed.Then combined with Newton iteration algorithm,the intermediate algorithm was used to directly estimate the inverse of higher-order matrix,and the result was taken as the initial value of Newton iteration algorithm to accelerate the convergence speed.The simulation results show that WWSESOR-NT algorithm can approximate the performance of WWSE algorithm with fewer iterations and approximately the same complexity. |
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| Keywords: | massive MIMO MMSE precoding SOR iteration Newton iteration |
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