J4 ›› 2012, Vol. 29 ›› Issue (5): 651-656.

• Optical Communication • Previous Articles    

Downlink beamforming technology research for TD-LTE system

WANG Qiang1,2, YAN Feng-ping1,2   

  1. 1 Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China; 
    2 Key Laboratory of All Optical Network & Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China
  • Received:2011-09-27 Revised:2011-10-14 Published:2012-09-28 Online:2012-09-02

Abstract:

An algorithm that is based on beamforming system models and algorithms criteria is simpler than the traditional Eigen-value decomposition method. It also can overcome the problem of the large complexity and system delay in the process of the Beamforming. According to the TD-LTE protocol, an uplink signal source and model is constructed. And then, the beamforming weighting factor is got by constructing the complete beamforming link. In the multipath fading channel, the traditional Eigen-value decomposition algorithm that is based on the QR factorization (a method of orthogonal matrix triangularization) and simple algorithm is simulated. The results indicate that the simple EBB algorithm can reduce the complexity by 1/60 and keep in the same or similar precision with the traditional algorithm.

Key words: optical communication, beamforming algorithm, simulation analysis, TD-LTE, weight coefficient

CLC Number: 

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