Two-timescale weighted sum-rate maximization for large cellular and cell-free massive MIMO

We reconsider the problem of joint power control and beamforming design to maximize the weighted sum rate in large and potentially cell-free massive MIMO networks. In contrast to the available short-term methods, where an iterative algorithm is run for every instantaneous channel realization, we der...

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Bibliographic Details
Main Authors: Miretti, Lorenzo, Bjornson, Emil, Stanczak, Slawomir
Format: Conference Proceeding
Language:English
Subjects:
Array signal processing
Channel state information
Conferences
Decoding
distributed beamforming
Fading channels
Iterative methods
Massive MIMO
Power control
Signal processing algorithms
team MMSE
Wireless communication
WMMSE
XL-MIMO
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Summary:We reconsider the problem of joint power control and beamforming design to maximize the weighted sum rate in large and potentially cell-free massive MIMO networks. In contrast to the available short-term methods, where an iterative algorithm is run for every instantaneous channel realization, we derive an iterative algorithm that can be run only sporadically leveraging known channel statistics, with minor performance loss. In addition, our algorithm also applies to the design of non-trivial cooperative beamforming schemes subject to limited sharing of instantaneous channel state information. Furthermore, our algorithm generalizes and outperforms the competing long-term methods from the massive MIMO literature, which are restricted to long-term power control only or to long-term joint power control and large-scale fading decoding design.
ISSN:1948-3252
DOI:10.1109/SPAWC60668.2024.10694441