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Low-Complexity Decision Feedback Equalization for Single-Carrier Massive MIMO Systems
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DOI：10.1109/TVT.2024.3431672.png)
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Decision feedback equalization (DFE) has demonstrated its potential to achieve near-optimal performance in signal detection within single-carrier massive MIMO systems. However, matrix-inversion-based DFE schemes are not suitable for massive MIMO systems due to their prohibitively high computational complexity. In this paper, we investigate frequency domain DFE for signal detection in single-carrier massive MIMO systems with the goal of reducing computational complexity for practical applications. We propose a low-complexity implicit DFE scheme for single-carrier massive MIMO systems, which mitigates inter-stream and inter-symbol interference by leveraging the Neumann series (NS) expansion for matrix inversion approximation (MIA). The proposed scheme performs DFE implicitly by recursively computing forward/feedback signals using the NS expansion, thereby avoiding computationally intensive matrix inversions and forward/feedback filters calculation. Simulation and analysis results indicate that, compared to matrix-inversion-based DFE schemes, the proposed implicit DFE scheme can significantly reduce computational complexity while achieving similar performance in single-carrier massive MIMO systems. Moreover, it outperforms existing low-complexity detection methods under stringent channel conditions while maintaining similar or even lower complexity.
Keyword:
Decision feedback equalizers
Massive MIMO
Computational complexity
Frequency-domain analysis
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Signal detection
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Single-carrier
massive MIMO
decision feedback equalization
low-complexity signal detection
frequency domain equalization
期刊
IF:
7.1
论文数:
1.8W
被引数:
6.6W
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Single Carrier Modulation With Nonlinear Frequency Domain Equalization: An Idea Whose Time Has Come-Again.png)
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