Telecommunications Science ›› 2019, Vol. 35 ›› Issue (3): 69-75.doi: 10.11959/j.issn.1000-0801.2019048

• research and development • Previous Articles     Next Articles

A low complexity ZF precoding scheme based on weighted Gauss-Seidel in massive MIMO systems

Dong ZHOU1,Haiyan CAO1,Fangmin XU1,Xin FANG1,Xiumin WANG2   

  1. 1 Hangzhou Dianzi University,Hangzhou 310018,China
    2 China Jiliang University,Hangzhou 310018,China
  • Revised:2019-03-01 Online:2019-03-01 Published:2019-03-23
  • Supported by:
    The National Natural Science Foundation of China(61501158);The National Natural Science Foundation of China(61379027);The Natural Science Foundation of Zhejiang Province of China(LY14F010019);The Natural Science Foundation of Zhejiang Province of China(LQ15F01004)

Abstract:

In massive MIMO systems,due to inversion of Hermitian matrix,the complexity of the traditional ZF precoding method increases exponentially with increase of the number of users.To solve this problem,a low complexity digital ZF precoding scheme based on weighted Gauss-Seidel (WGS) was proposed.That was weighted addtion the iteration results of previous step and Gausee-Seidel iteration results to accelerate the iterative convergence.The weighting factor was determined by the least mean square sum,and the weighting factor was proved to make the algorithm converge.The simulation results show that the WGS algorithm can approximate the performance of ZF precoding scheme with very few iterations,and reduce the complexity of ZF precoding from O(K 3) to O(K2),where K is the number of users.

Key words: massive MIMO, ZF precoding, weighted Gauss-Seidel, low complexity

CLC Number: 

No Suggested Reading articles found!