Abstract:
This paper proposes a novel layered belief propagation (BP) detector with a concatenated structure of two different BP layers for low-complexity large multi-user multi-in...Show MoreMetadata
Abstract:
This paper proposes a novel layered belief propagation (BP) detector with a concatenated structure of two different BP layers for low-complexity large multi-user multi-input multi-output (MU-MIMO) detection based on statistical beams. To reduce the computational burden and the circuit scale on the base station (BS) side, the two-stage signal processing consisting of slow varying outer beamformer (OBF) and group-specific MU detection (MUD) for fast channel variations is effective. However, the dimensionality reduction of the equivalent channel based on the OBF results in significant performance degradation in subsequent spatial filtering detection. To compensate for the drawback, the proposed layered BP detector, which is designed for improving the detection capability by suppressing the intra- and inter-group interference in stages, is introduced as the poststage processing of the OBF. Finally, we demonstrate the validity of our proposed method in terms of the bit error rate (BER) performance and the computational complexity.
Date of Conference: 20-24 May 2019
Date Added to IEEE Xplore: 15 July 2019
ISBN Information:
ISSN Information:
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- IEEE Keywords
- Index Terms
- Belief Propagation ,
- Dimensionality Reduction ,
- Base Station ,
- Beamforming ,
- Bit Error Rate ,
- Detection Capability ,
- Spatial Filter ,
- Bit Error ,
- Bit Error Rate Performance ,
- Error Rate Performance ,
- Likelihood Ratio Test ,
- Iterative Process ,
- Additive Noise ,
- Signal Model ,
- Projection Matrix ,
- Antenna Array ,
- Discrete Fourier Transform ,
- Minimum Mean Square Error ,
- Coherence Time ,
- Channel Matrix ,
- User Equipment ,
- Spatial Multiplexing ,
- Angular Spread ,
- Quadrature Phase Shift Keying ,
- Angular Domain ,
- M-current ,
- Discrete Fourier Transform Matrix ,
- Channel Statistics ,
- Rx Antenna ,
- Maximum Ratio Combining
Keywords assist with retrieval of results and provide a means to discovering other relevant content. Learn more.
- IEEE Keywords
- Index Terms
- Belief Propagation ,
- Dimensionality Reduction ,
- Base Station ,
- Beamforming ,
- Bit Error Rate ,
- Detection Capability ,
- Spatial Filter ,
- Bit Error ,
- Bit Error Rate Performance ,
- Error Rate Performance ,
- Likelihood Ratio Test ,
- Iterative Process ,
- Additive Noise ,
- Signal Model ,
- Projection Matrix ,
- Antenna Array ,
- Discrete Fourier Transform ,
- Minimum Mean Square Error ,
- Coherence Time ,
- Channel Matrix ,
- User Equipment ,
- Spatial Multiplexing ,
- Angular Spread ,
- Quadrature Phase Shift Keying ,
- Angular Domain ,
- M-current ,
- Discrete Fourier Transform Matrix ,
- Channel Statistics ,
- Rx Antenna ,
- Maximum Ratio Combining