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Precoder design in downlink CoMP-JT MIMO network via WMMSE and asynchronous ADMM

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Abstract

Precoder design of coordinated multi-point joint transmission (CoMP-JT) multiple-input and multiple-output (MIMO) network aimied at throughput maximization is a challenging problem. In this paper, we propose an asynchronous distributed iterative method to solve this problem. We transform the original throughput maximizing problem to the weighted minimum mean square error (WMMSE) problem, then decompose the problem into a series of subproblems. Based on alternation direction method of multipliers (ADMM), the proposed algorithm can solve the optimal precoder in a distributed manner. With asynchronous information exchange mechanism considered, the convergence rate of our algorithm can be accelerated further. Numerical results demonstrate the increase of throughput and the optimality of the precoding scheme provided by our algorithm.

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Acknowledgements

This work was supported in part by Beijing Natural Science Foundation (Grant No. 4152047) and National Natural Science Foundation of China (Grant Nos. 61671058, 61371075).

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Correspondence to Zesong Fei.

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Wu, Z., Fei, Z. Precoder design in downlink CoMP-JT MIMO network via WMMSE and asynchronous ADMM. Sci. China Inf. Sci. 61, 082306 (2018). https://doi.org/10.1007/s11432-017-9275-y

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Keywords

  • multiple-input and multiple-output
  • coordinated multi-point joint transmission
  • weighted minimum mean square error
  • block coordinate descent
  • alternation direction method of multipliers
  • asynchronous method