Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (4): 757-760.

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Optimal downlink power allocation strategy and beamforming algorithm

PENG Jian-hui1, YE Zhong-fu1,2, XU Xu1   

  1. 1. Inst. of Statistical Signal Processing, Univ. of Science and Technology of China, Hefei 230027, China;
    2. National Key Lab. of Mobile Communications, Southeast Univ., Nanjing 210096, China
  • Received:2007-10-07 Revised:2007-12-21 Online:2009-04-20 Published:2010-01-03

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Abstract: Aiming at the downlink precoding problem,a novel algorithm based on the theory of second-order cone programming is proposed.It reformulates the joint optimization problem of power allocation and beamforming as a convex optimization with single augment.In fact,it is a second-order cone programming problem,and thus can be solved by an interior-point algorithm.Furthermore,the proposed method is robust against imperfect channel state information.Simulations prove the validity of the proposed method.

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