What does this research mean for the field?

The CsiMamba model enhances channel state information (CSI) feedback efficiency in frequency-division duplex massive MIMO systems, reducing parameter count by 14.3% and computational complexity by 36.9% compared to CsiFormer while improving transmission reliability. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To develop a low-complexity channel state information (CSI) feedback model for frequency-division duplex massive MIMO systems that minimizes overhead while improving downlink transmission reliability.

August 26, 2026ETRI JournalOpen Access

CsiMamba: Efficient Channel State Information Feedback for Frequency‐Division Duplex Massive Multiple‐Input Multiple‐Output Systems

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Authors

BYBora YoonSejong University JKJunghyun KimSejong University DYDukhyun YouElectronics and Telecommunications Research Institute

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Implication

Simulation study demonstrates reduced complexity and lower error rates for Mamba-based CSI feedback in FDD massive MIMO systems, indicating improved downlink transmission efficiency.

Key Points

To develop a low-complexity channel state information (CSI) feedback model for frequency-division duplex massive MIMO systems that minimizes overhead while improving downlink transmission reliability.
Designed CsiMamba, integrating state-space-model sequence modeling with convolutional and lightweight MB blocks to capture local and global CSI features.
Evaluated performance using 5G New Radio clustered delay line-C channel simulations across unquantized and quantized feedback settings, benchmarked against CsiFormer.
Reduced model parameters by 14.3% and lowered computational complexity by 36.9% compared with CsiFormer.
Achieved superior bit-error-rate and block-error-rate performance, with enhanced performance advantages observed under quantized feedback conditions.

Cite This Study

Yoon et al. (2026) studied this question.

synapsesocial.com/papers/6a8e9b68451774b83f3b41ff https://doi.org/10.4218/etrij.2025-0542

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Implication

Simulation study demonstrates reduced complexity and lower error rates for Mamba-based CSI feedback in FDD massive MIMO systems, indicating improved downlink transmission efficiency.

CsiMamba: Efficient Channel State Information Feedback for Frequency‐Division Duplex Massive Multiple‐Input Multiple‐Output Systems

Discussion

Member takes

Implication

Key Points

Cite This Study

CsiMamba: Efficient Channel State Information Feedback for Frequency‐Division Duplex Massive Multiple‐Input Multiple‐Output Systems

Discussion

Member takes

Implication

Key Points

Cite This Study

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