Stephan, P., Euchner, F., & ten Brink, S. (2024). Channel Charting-Based Channel Prediction on Real-World Distributed Massive MIMO CSI. arXiv preprint arXiv:2410.11486.
This paper investigates the feasibility and effectiveness of using channel charting for channel prediction in distributed massive MIMO systems to mitigate the performance degradation caused by channel aging.
The authors propose a channel prediction method based on channel charting, where a deep neural network learns a physically meaningful latent representation of the radio environment (channel chart) from CSI data. They utilize a geodesic, fused dissimilarity metric for channel charting and employ linear extrapolation for predicting future channel chart positions. Based on these predicted positions, the future CSI is estimated using either linear interpolation (CC-interp) or nearest neighbor (CC-NN) approaches. The proposed method is evaluated on a real-world distributed massive MIMO dataset and compared against a Wiener predictor and outdated CSI in terms of achievable sum rate.
Channel charting proves to be a promising technique for channel prediction in distributed massive MIMO systems, offering improved resilience against channel aging compared to traditional methods. The proposed method effectively leverages the spatial information embedded in the channel chart to predict future CSI and enhance downlink communication performance.
This research contributes to the field of wireless communication by introducing a novel and effective channel prediction method based on channel charting. It addresses the crucial challenge of channel aging in distributed massive MIMO systems, paving the way for improved data throughput and overall system performance in future wireless networks.
The study is limited to single-user scenarios with relatively slow and constant UE velocities. Future research should investigate the effectiveness of the proposed method in multi-user scenarios, consider more sophisticated latent space prediction techniques, and explore advanced CSI interpolation methods for further performance improvement. Additionally, extending the approach to joint downlink communication schemes involving multiple base station arrays is a promising direction.
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by Phillip Step... at arxiv.org 10-16-2024
https://arxiv.org/pdf/2410.11486.pdfDeeper Inquiries