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Computer Science > Information Theory

arXiv:2408.12329 (cs)
[Submitted on 22 Aug 2024 (v1), last revised 10 Nov 2024 (this version, v2)]

Title:Asynchronous Cell-Free Massive MIMO-OFDM: Mixed Coherent and Non-Coherent Transmissions

Authors:Guoyu Li, Shaochuan Wu, Changsheng You, Wenbin Zhang, Guanyu Shang
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Abstract:In this letter, we analyze the performance of mixed coherent and non-coherent transmissions approach, which can improve the performance of cell-free multiple-input multiple-output orthogonal frequency division multiplexing (CF mMIMO-OFDM) systems under asynchronous reception. To this end, we first obtain the achievable downlink sum-rate for the mixed coherent and non-coherent transmissions, and then provide a closed-form expression for the case with the maximum ratio precoding. Subsequently, an efficient clustering algorithm is proposed to group access points into different clusters with the same quantized phase shift in each cluster. Numerical results demonstrate that the mixed coherent and non-coherent transmissions can effectively improve the sum-rate of CF mMIMO-OFDM systems under asynchronous reception.
Comments: This work is submitted to IEEE for possible publication
Subjects: Information Theory (cs.IT); Signal Processing (eess.SP)
Cite as: arXiv:2408.12329 [cs.IT]
  (or arXiv:2408.12329v2 [cs.IT] for this version)
  https://doi.org/10.48550/arXiv.2408.12329

Submission history

From: Guoyu Li [view email]
[v1] Thu, 22 Aug 2024 12:12:58 UTC (794 KB)
[v2] Sun, 10 Nov 2024 14:11:24 UTC (231 KB)
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