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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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Authors and Affiliations

  1. School of Information Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China

    Zhikun Wu & Zesong Fei

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  1. Zhikun Wu
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  2. Zesong Fei
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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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  • DOI: https://doi.org/10.1007/s11432-017-9275-y

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