研究目的
To address the near-far problem in mmWave MIMO systems where the user tries to retrieve the information signal from the base station under the strong intended jamming signal by proposing a novel hybrid beamforming design.
研究成果
The proposed hybrid beamforming design effectively mitigates the intended jamming interference in downlink multiuser massive MIMO systems with lower computational complexity and achieves better performance than other algorithms.
研究不足
The proposed algorithm achieves a lower sum rate at the low SNRuser range due to jamming impact cancellation constraints. The performance is also affected by the number of data streams.
1：Experimental Design and Method Selection:
The study considers a downlink mmWave MIMO multiuser system with a hybrid architecture. The proposed hybrid beamforming design includes analog and digital parts to cancel the jamming signal and mitigate intra-cell interference.
2：Sample Selection and Data Sources:
The simulation assumes eight users experiencing mmWave propagation channels with Nray = 15 and two jammers with omni-directional antennas.
3：List of Experimental Equipment and Materials:
The setup includes a base station with Nt = 128 antennas and Nr = 16 receive antennas for each user.
4：Experimental Procedures and Operational Workflow:
The analog combiner is designed to null the jamming signal, and the analog precoder is calculated using the column iterative algorithm. The digital part is designed based on the block diagonalization algorithm.
5：Data Analysis Methods:
The performance is evaluated based on the sum rate of the system under varying SNR conditions and the number of data streams.
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