Robust MMSE beamforming for multiantenna relay networks

Kanapathippillai Cumanan, Zhiguo Ding, Yogachandran Rahulamathavan, Mehdi M. Molu, Hsiao Hwa Chen

研究成果: Review article同行評審

15 引文 斯高帕斯(Scopus)


In this paper, we propose a robust minimum mean square error (MMSE)-based beamforming technique for multiantenna relay broadcast channels, where a multiantenna base station transmits signal to single antenna users with the help of a multiantenna relay. The signal transmission from the base station to the single antenna users is completed in two time slots, where the relay receives the signal from the base station in the first time slot, and it then forwards the received signal to different users based on amplify and forward (AF) protocol.We propose a robust beamforming technique for a sum-power minimization problem with an imperfect channel state information (CSI) between the relay and the users. This robust scheme is developed based on the worst-case optimization framework and the NemirovskiLemma by incorporating uncertainties in the CSI. The original optimization problem is divided into three subproblems due to joint nonconvexity in terms of beamforming vectors at the base station, the relay amplification matrix, and receiver coefficients. These subproblems are formulated into a convex optimization framework by exploiting the Nemirovski Lemma, and an iterative algorithm is developed by alternatively optimizing each of them with channel uncertainties. In addition, we provide an optimization framework to evaluate the achievable worst-case mean square error (MSE) of each user for a given set of design parameters. Simulation results are provided to validate the convergence of the proposed algorithm.

頁(從 - 到)3900-3912
期刊IEEE Transactions on Vehicular Technology
出版狀態Published - 2017 五月

All Science Journal Classification (ASJC) codes

  • 汽車工程
  • 航空工程
  • 電氣與電子工程
  • 應用數學


深入研究「Robust MMSE beamforming for multiantenna relay networks」主題。共同形成了獨特的指紋。