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<p>This correspondence proposes an efficient pilot allocation strategy based on arithmetic/geometric progression to eliminate the inhibitory effects of pilot contamination. A cell-free massive multiple-input-multiple-output system with hardware defects having spatially correlated channel has been analyzed here. The hardware impairments considered here includes additive distortion, multiplicative phase drifts, and amplified thermal noise. As visualized from the numerical analyses, the suggested progression-based pilot allocation method can greatly boost system performance and minimise the complexity of allocating pilot signals when compared to standard pilot allocation strategies.</p>

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Efficient pilot contamination reduction in spatially correlated cell-free massive MIMO systems with hardware impairments

  • 期刊论文

  • 发表日期：

    2025年2月14日

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  • Abhinaba Dey,
  • Prabina Pattanayak

摘要

This correspondence proposes an efficient pilot allocation strategy based on arithmetic/geometric progression to eliminate the inhibitory effects of pilot contamination. A cell-free massive multiple-input-multiple-output system with hardware defects having spatially correlated channel has been analyzed here. The hardware impairments considered here includes additive distortion, multiplicative phase drifts, and amplified thermal noise. As visualized from the numerical analyses, the suggested progression-based pilot allocation method can greatly boost system performance and minimise the complexity of allocating pilot signals when compared to standard pilot allocation strategies.